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    <link:label id="lab_us-gaap_DebtInstrumentLineItems_C5EB158D5054CAAF7D72B9680F6F2584_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_C5EB158D5054CAAF7D72B9680F6F2584" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_D8CC2F000207FAEE633CB9680F6F20FC_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_D8CC2F000207FAEE633CB9680F6F20FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Basis Spread on Variable Rate</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_1E5C630DEAFDBE9D974FB9680F6FFB3B_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_1E5C630DEAFDBE9D974FB9680F6FFB3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average revolving interest rate, percentage</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_1E5C630DEAFDBE9D974FB9680F6FFB3B_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_1E5C630DEAFDBE9D974FB9680F6FFB3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Interest Rate During Period</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_53D0EC467E440ADB4561B9680F6F8282_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_53D0EC467E440ADB4561B9680F6F8282" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Remaining Borrowing Capacity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_53D0EC467E440ADB4561B9680F6F8282" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_43247148D499C4FCABF4B9680F6F81EF_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_43247148D499C4FCABF4B9680F6F81EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_43247148D499C4FCABF4B9680F6F81EF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_DF7A0A117A31317013D4B9680F7068C0_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_DF7A0A117A31317013D4B9680F7068C0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate principal amount</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_DF7A0A117A31317013D4B9680F7068C0" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentPeriodicPayment_88041E48F02341F371D6B9680F705458_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentPeriodicPayment_88041E48F02341F371D6B9680F705458" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Annual installment debt payments</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentPeriodicPayment" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPayment_88041E48F02341F371D6B9680F705458" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_AC424E5F10D0F5529F7AB9680F706434_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_AC424E5F10D0F5529F7AB9680F706434" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt instrument, stated interest rate percentage</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_AC424E5F10D0F5529F7AB9680F706434_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_AC424E5F10D0F5529F7AB9680F706434" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</link:label>
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    <link:label id="lab_msa_DebtInstrumentCovenantFixedChargesCoverageRatioMinimum_655B9A85AFE6528D068CB9680F70AA43_terseLabel_en-US" xlink:label="lab_msa_DebtInstrumentCovenantFixedChargesCoverageRatioMinimum_655B9A85AFE6528D068CB9680F70AA43" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum fixed charges coverage ratio (not less than)</link:label>
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    <link:label id="lab_msa_DebtInstrumentCovenantFixedChargesCoverageRatioMinimum_655B9A85AFE6528D068CB9680F70AA43_documentation_en-US" xlink:label="lab_msa_DebtInstrumentCovenantFixedChargesCoverageRatioMinimum_655B9A85AFE6528D068CB9680F70AA43" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Covenant, Fixed Charges Coverage Ratio, Minimum</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_DebtInstrumentCovenantFixedChargesCoverageRatioMinimum" xlink:label="loc_msa_DebtInstrumentCovenantFixedChargesCoverageRatioMinimum_655B9A85AFE6528D068CB9680F70AA43" xlink:type="locator" />
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    <link:label id="lab_msa_DebtInstrumentCovenantConsolidatedLeverageRatioMaximum_4D8757B9AAF6861A33A5B9680F707DA7_terseLabel_en-US" xlink:label="lab_msa_DebtInstrumentCovenantConsolidatedLeverageRatioMaximum_4D8757B9AAF6861A33A5B9680F707DA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum consolidated leverage ratio (not to exceed)</link:label>
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    <link:label id="lab_us-gaap_LettersOfCreditOutstandingAmount_5677E867D5F3BB6914FEB9680F709FDE_terseLabel_en-US" xlink:label="lab_us-gaap_LettersOfCreditOutstandingAmount_5677E867D5F3BB6914FEB9680F709FDE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from lines of credit</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxesReceivable" xlink:label="loc_us-gaap_IncomeTaxesReceivable_C403BD98C5D1656AE4CFB96B54F1E990" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesReceivable_C403BD98C5D1656AE4CFB96B54F1E990" xlink:to="lab_us-gaap_IncomeTaxesReceivable_C403BD98C5D1656AE4CFB96B54F1E990" xlink:type="arc" />
    <link:label id="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_D70ADFED8C7FFEE14677B96B54F1C887_verboseLabel_en-US" xlink:label="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_D70ADFED8C7FFEE14677B96B54F1C887" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Notes receivable, insurance companies (Note 19)</link:label>
    <link:label id="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_D70ADFED8C7FFEE14677B96B54F1C887_label_en-US" xlink:label="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_D70ADFED8C7FFEE14677B96B54F1C887" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Notes, Loans and Financing Receivable, Net, Insurance Companies, Current</link:label>
    <link:label id="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_D70ADFED8C7FFEE14677B96B54F1C887_documentation_en-US" xlink:label="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_D70ADFED8C7FFEE14677B96B54F1C887" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Notes, Loans and Financing Receivable, Net, Insurance Companies, Current</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent" xlink:label="loc_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_D70ADFED8C7FFEE14677B96B54F1C887" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_D70ADFED8C7FFEE14677B96B54F1C887" xlink:to="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_D70ADFED8C7FFEE14677B96B54F1C887" xlink:type="arc" />
    <link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_D8CF5696D54E108BC467B96B54F10A4A_terseLabel_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_D8CF5696D54E108BC467B96B54F10A4A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prepaid expenses and other current assets</link:label>
    <link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_D8CF5696D54E108BC467B96B54F10A4A_label_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_D8CF5696D54E108BC467B96B54F10A4A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prepaid Expense and Other Assets, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_D8CF5696D54E108BC467B96B54F10A4A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_D8CF5696D54E108BC467B96B54F10A4A" xlink:to="lab_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_D8CF5696D54E108BC467B96B54F10A4A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsCurrent_261375BD5AB774109C11B96B54F1A005_totalLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrent_261375BD5AB774109C11B96B54F1A005" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total current assets</link:label>
    <link:label id="lab_us-gaap_AssetsCurrent_261375BD5AB774109C11B96B54F1A005_label_en-US" xlink:label="lab_us-gaap_AssetsCurrent_261375BD5AB774109C11B96B54F1A005" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_261375BD5AB774109C11B96B54F1A005" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsCurrent_261375BD5AB774109C11B96B54F1A005" xlink:to="lab_us-gaap_AssetsCurrent_261375BD5AB774109C11B96B54F1A005" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_52E286CCF2C2AC247A47B96B54F11D80_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_52E286CCF2C2AC247A47B96B54F11D80" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, plant and equipment, net (Note 6)</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_52E286CCF2C2AC247A47B96B54F11D80_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_52E286CCF2C2AC247A47B96B54F11D80" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_52E286CCF2C2AC247A47B96B54F11D80" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_52E286CCF2C2AC247A47B96B54F11D80" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_52E286CCF2C2AC247A47B96B54F11D80" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_94562286F5B8EDFAC72DB96B54F2A342_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_94562286F5B8EDFAC72DB96B54F2A342" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prepaid pension cost</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_94562286F5B8EDFAC72DB96B54F2A342_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_94562286F5B8EDFAC72DB96B54F2A342" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets for Plan Benefits, Defined Benefit Plan</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_94562286F5B8EDFAC72DB96B54F2A342" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_94562286F5B8EDFAC72DB96B54F2A342" xlink:to="lab_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_94562286F5B8EDFAC72DB96B54F2A342" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsNet_4FDD5CCD6FF0FBC5291BB96B54F2F786_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNet_4FDD5CCD6FF0FBC5291BB96B54F2F786" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred tax assets (Note 11)</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsNet_4FDD5CCD6FF0FBC5291BB96B54F2F786_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNet_4FDD5CCD6FF0FBC5291BB96B54F2F786" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Net of Valuation Allowance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_4FDD5CCD6FF0FBC5291BB96B54F2F786" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_4FDD5CCD6FF0FBC5291BB96B54F2F786" xlink:to="lab_us-gaap_DeferredTaxAssetsNet_4FDD5CCD6FF0FBC5291BB96B54F2F786" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_C2B654A488ED7761A948B96B54F2BBAA_verboseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_C2B654A488ED7761A948B96B54F2BBAA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Goodwill (Note 14)</link:label>
    <link:label id="lab_us-gaap_Goodwill_C2B654A488ED7761A948B96B54F2BBAA_label_en-US" xlink:label="lab_us-gaap_Goodwill_C2B654A488ED7761A948B96B54F2BBAA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_C2B654A488ED7761A948B96B54F2BBAA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_C2B654A488ED7761A948B96B54F2BBAA" xlink:to="lab_us-gaap_Goodwill_C2B654A488ED7761A948B96B54F2BBAA" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_FB18264783506C2BB317B96B54F2CDE7_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_FB18264783506C2BB317B96B54F2CDE7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intangible assets (Note 14)</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_FB18264783506C2BB317B96B54F2CDE7_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_FB18264783506C2BB317B96B54F2CDE7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_FB18264783506C2BB317B96B54F2CDE7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_FB18264783506C2BB317B96B54F2CDE7" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsNet_FB18264783506C2BB317B96B54F2CDE7" xlink:type="arc" />
    <link:label id="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent_463F27AE6D530601373AB96B54F2805F_terseLabel_en-US" xlink:label="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent_463F27AE6D530601373AB96B54F2805F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Notes receivable, insurance companies, noncurrent (Note 19)</link:label>
    <link:label id="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent_463F27AE6D530601373AB96B54F2805F_label_en-US" xlink:label="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent_463F27AE6D530601373AB96B54F2805F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Notes, Loans and Financing Receivable, Net, Insurance Companies, Noncurrent</link:label>
    <link:label id="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent_463F27AE6D530601373AB96B54F2805F_documentation_en-US" xlink:label="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent_463F27AE6D530601373AB96B54F2805F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Notes, Loans and Financing Receivable, Net, Insurance Companies, Noncurrent</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent" xlink:label="loc_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent_463F27AE6D530601373AB96B54F2805F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent_463F27AE6D530601373AB96B54F2805F" xlink:to="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesNoncurrent_463F27AE6D530601373AB96B54F2805F" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_02E2CA7106B03A532B7AB96B54F360C9_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_02E2CA7106B03A532B7AB96B54F360C9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Insurance receivable (Note 19) and other noncurrent assets</link:label>
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_02E2CA7106B03A532B7AB96B54F360C9_label_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_02E2CA7106B03A532B7AB96B54F360C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_02E2CA7106B03A532B7AB96B54F360C9" xlink:type="locator" />
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    <link:label id="lab_us-gaap_Assets_DFB0E30CE9A8690D4E22B96B54F3D192_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_DFB0E30CE9A8690D4E22B96B54F3D192" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total assets</link:label>
    <link:label id="lab_us-gaap_Assets_DFB0E30CE9A8690D4E22B96B54F3D192_label_en-US" xlink:label="lab_us-gaap_Assets_DFB0E30CE9A8690D4E22B96B54F3D192" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_DFB0E30CE9A8690D4E22B96B54F3D192" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_DFB0E30CE9A8690D4E22B96B54F3D192" xlink:to="lab_us-gaap_Assets_DFB0E30CE9A8690D4E22B96B54F3D192" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAbstract_FDE182DE9A3F2424707AB96B54F38CA8_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract_FDE182DE9A3F2424707AB96B54F38CA8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAbstract_FDE182DE9A3F2424707AB96B54F38CA8_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract_FDE182DE9A3F2424707AB96B54F38CA8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities [Abstract]</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_F498650A0FF2409B8550B96B54F3BB8B_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_F498650A0FF2409B8550B96B54F3BB8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_F498650A0FF2409B8550B96B54F3BB8B_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_F498650A0FF2409B8550B96B54F3BB8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current [Abstract]</link:label>
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    <link:label id="lab_us-gaap_DebtCurrent_85EF68271FA734D4ECAEB96B54F302AD_terseLabel_en-US" xlink:label="lab_us-gaap_DebtCurrent_85EF68271FA734D4ECAEB96B54F302AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Notes payable and current portion of long-term debt, net (Note 13)</link:label>
    <link:label id="lab_us-gaap_DebtCurrent_85EF68271FA734D4ECAEB96B54F302AD_label_en-US" xlink:label="lab_us-gaap_DebtCurrent_85EF68271FA734D4ECAEB96B54F302AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt, Current</link:label>
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    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A9023955F83CA72C9221B96B54D4C48A_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A9023955F83CA72C9221B96B54D4C48A" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Capital expenditures</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_A9023955F83CA72C9221B96B54D4C48A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_2EA9DAD4CADB8800D8B0B96B54D4BEB0_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_2EA9DAD4CADB8800D8B0B96B54D4BEB0" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Property disposals</link:label>
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    <link:label id="lab_us-gaap_DistributionRightsMember_FAEA947A3D4AD09F7F09B96B540A77B3_terseLabel_en-US" xlink:label="lab_us-gaap_DistributionRightsMember_FAEA947A3D4AD09F7F09B96B540A77B3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Distributor relationships</link:label>
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    <link:label id="lab_us-gaap_TechnologyBasedIntangibleAssetsMember_F16EFCCF854AF7E8CA32B96B540AB795_verboseLabel_en-US" xlink:label="lab_us-gaap_TechnologyBasedIntangibleAssetsMember_F16EFCCF854AF7E8CA32B96B540AB795" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Acquired technology and other intangible assets</link:label>
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    <link:label id="lab_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_CB613E56B99C918EC4C5B96B540C9709_terseLabel_en-US" xlink:label="lab_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_CB613E56B99C918EC4C5B96B540C9709" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Acquired intangible assets, amortization period</link:label>
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    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseNextTwelveMonths_1180AC3226755F53A330B96B540D34D4_terseLabel_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseNextTwelveMonths_1180AC3226755F53A330B96B540D34D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated future depreciation expense, year 1</link:label>
    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseNextTwelveMonths_1180AC3226755F53A330B96B540D34D4_label_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseNextTwelveMonths_1180AC3226755F53A330B96B540D34D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquired Property, Plant And Equipment, Depreciation Expense, Next Twelve Months</link:label>
    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseNextTwelveMonths_1180AC3226755F53A330B96B540D34D4_documentation_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseNextTwelveMonths_1180AC3226755F53A330B96B540D34D4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquired Property, Plant And Equipment, Depreciation Expense, Next Twelve Months</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseNextTwelveMonths" xlink:label="loc_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseNextTwelveMonths_1180AC3226755F53A330B96B540D34D4" xlink:type="locator" />
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    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearTwo_D78C2E967F055129472CB96B540DB170_terseLabel_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearTwo_D78C2E967F055129472CB96B540DB170" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated future depreciation expense, year 2</link:label>
    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearTwo_D78C2E967F055129472CB96B540DB170_label_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearTwo_D78C2E967F055129472CB96B540DB170" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquired Property, Plant And Equipment, Depreciation Expense, Year Two</link:label>
    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearTwo_D78C2E967F055129472CB96B540DB170_documentation_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearTwo_D78C2E967F055129472CB96B540DB170" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquired Property, Plant And Equipment, Depreciation Expense, Year Two</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearTwo" xlink:label="loc_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearTwo_D78C2E967F055129472CB96B540DB170" xlink:type="locator" />
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    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearThree_B5BD309939CF0B668EB6B96B540EEF8F_terseLabel_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearThree_B5BD309939CF0B668EB6B96B540EEF8F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated future depreciation expense, year 3</link:label>
    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearThree_B5BD309939CF0B668EB6B96B540EEF8F_label_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearThree_B5BD309939CF0B668EB6B96B540EEF8F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquired Property, Plant And Equipment, Depreciation Expense, Year Three</link:label>
    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearThree_B5BD309939CF0B668EB6B96B540EEF8F_documentation_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearThree_B5BD309939CF0B668EB6B96B540EEF8F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquired Property, Plant And Equipment, Depreciation Expense, Year Three</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearThree" xlink:label="loc_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearThree_B5BD309939CF0B668EB6B96B540EEF8F" xlink:type="locator" />
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    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearFour_1ECD57150F19575B05F6B96B540E0935_terseLabel_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearFour_1ECD57150F19575B05F6B96B540E0935" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated future depreciation expense, year 4</link:label>
    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearFour_1ECD57150F19575B05F6B96B540E0935_label_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearFour_1ECD57150F19575B05F6B96B540E0935" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquired Property, Plant And Equipment, Depreciation Expense, Year Four</link:label>
    <link:label id="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearFour_1ECD57150F19575B05F6B96B540E0935_documentation_en-US" xlink:label="lab_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearFour_1ECD57150F19575B05F6B96B540E0935" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquired Property, Plant And Equipment, Depreciation Expense, Year Four</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearFour" xlink:label="loc_msa_AcquiredPropertyPlantAndEquipmentDepreciationExpenseYearFour_1ECD57150F19575B05F6B96B540E0935" xlink:type="locator" />
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    <link:label id="lab_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_119A870A19E78E0CD935B96B540E77EF_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_119A870A19E78E0CD935B96B540E77EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_119A870A19E78E0CD935B96B540E77EF_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_119A870A19E78E0CD935B96B540E77EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Goodwill, Expected Tax Deductible Amount</link:label>
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    <link:label id="lab_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_4CBCFBF9C70EE2103991B96B540E12D0_netLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_4CBCFBF9C70EE2103991B96B540E12D0" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US">Sales</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_4CBCFBF9C70EE2103991B96B540E12D0_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_4CBCFBF9C70EE2103991B96B540E12D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_4CBCFBF9C70EE2103991B96B540E12D0" xlink:type="locator" />
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    <link:label id="lab_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_E0484F7B9DC14BE579A6B96B540FE4D5_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_E0484F7B9DC14BE579A6B96B540FE4D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_E0484F7B9DC14BE579A6B96B540FE4D5_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_E0484F7B9DC14BE579A6B96B540FE4D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_E0484F7B9DC14BE579A6B96B540FE4D5" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_C1631B45DC31E1312695B96B538AB0AA_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_C1631B45DC31E1312695B96B538AB0AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies Disclosure [Abstract]</link:label>
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    <link:label id="lab_us-gaap_MovementInLossContingencyRelatedReceivableIncreaseDecreaseRollForward_5213D796B20BE5194F87B96B538AFE17_terseLabel_en-US" xlink:label="lab_us-gaap_MovementInLossContingencyRelatedReceivableIncreaseDecreaseRollForward_5213D796B20BE5194F87B96B538AFE17" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_MovementInLossContingencyRelatedReceivableIncreaseDecreaseRollForward_5213D796B20BE5194F87B96B538AFE17_label_en-US" xlink:label="lab_us-gaap_MovementInLossContingencyRelatedReceivableIncreaseDecreaseRollForward_5213D796B20BE5194F87B96B538AFE17" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MovementInLossContingencyRelatedReceivableIncreaseDecreaseRollForward" xlink:label="loc_us-gaap_MovementInLossContingencyRelatedReceivableIncreaseDecreaseRollForward_5213D796B20BE5194F87B96B538AFE17" xlink:type="locator" />
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    <link:label id="lab_us-gaap_InsuranceSettlementsReceivable_9EE28A09572D2D07AF5CB96B538A5D1E_periodStartLabel_en-US" xlink:label="lab_us-gaap_InsuranceSettlementsReceivable_9EE28A09572D2D07AF5CB96B538A5D1E" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance beginning of period</link:label>
    <link:label id="lab_us-gaap_InsuranceSettlementsReceivable_9EE28A09572D2D07AF5CB96B538A5D1E_label_en-US" xlink:label="lab_us-gaap_InsuranceSettlementsReceivable_9EE28A09572D2D07AF5CB96B538A5D1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insurance Settlements Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InsuranceSettlementsReceivable" xlink:label="loc_us-gaap_InsuranceSettlementsReceivable_9EE28A09572D2D07AF5CB96B538A5D1E" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingencyRelatedReceivableCarryingValueAdditions" xlink:label="loc_us-gaap_LossContingencyRelatedReceivableCarryingValueAdditions_A6CF551A15335B969286B96B538B245C" xlink:type="locator" />
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    <link:label id="lab_msa_SingleIncidentMember_AF23AEB0F27F7C79C914D45D375524EB_label_en-US" xlink:label="lab_msa_SingleIncidentMember_AF23AEB0F27F7C79C914D45D375524EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Single Incident [Member]</link:label>
    <link:label id="lab_msa_SingleIncidentMember_AF23AEB0F27F7C79C914D45D375524EB_documentation_en-US" xlink:label="lab_msa_SingleIncidentMember_AF23AEB0F27F7C79C914D45D375524EB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Single Incident [Member]</link:label>
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    <link:label id="lab_us-gaap_UnassertedClaimMember_63EEB3B4FD2882C97284D45D3756A432_terseLabel_en-US" xlink:label="lab_us-gaap_UnassertedClaimMember_63EEB3B4FD2882C97284D45D3756A432" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unasserted Claim</link:label>
    <link:label id="lab_us-gaap_UnassertedClaimMember_63EEB3B4FD2882C97284D45D3756A432_label_en-US" xlink:label="lab_us-gaap_UnassertedClaimMember_63EEB3B4FD2882C97284D45D3756A432" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unasserted Claim [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnassertedClaimMember" xlink:label="loc_us-gaap_UnassertedClaimMember_63EEB3B4FD2882C97284D45D3756A432" xlink:type="locator" />
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    <link:label id="lab_msa_CumulativeTraumaMember_DDB71782FD7DD8E61CE5D45D375C19E5_terseLabel_en-US" xlink:label="lab_msa_CumulativeTraumaMember_DDB71782FD7DD8E61CE5D45D375C19E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cumulative Trauma</link:label>
    <link:label id="lab_msa_CumulativeTraumaMember_DDB71782FD7DD8E61CE5D45D375C19E5_label_en-US" xlink:label="lab_msa_CumulativeTraumaMember_DDB71782FD7DD8E61CE5D45D375C19E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cumulative Trauma [Member]</link:label>
    <link:label id="lab_msa_CumulativeTraumaMember_DDB71782FD7DD8E61CE5D45D375C19E5_documentation_en-US" xlink:label="lab_msa_CumulativeTraumaMember_DDB71782FD7DD8E61CE5D45D375C19E5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cumulative Trauma [Member]</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_CumulativeTraumaMember" xlink:label="loc_msa_CumulativeTraumaMember_DDB71782FD7DD8E61CE5D45D375C19E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_msa_CumulativeTraumaMember_DDB71782FD7DD8E61CE5D45D375C19E5" xlink:to="lab_msa_CumulativeTraumaMember_DDB71782FD7DD8E61CE5D45D375C19E5" xlink:type="arc" />
    <link:label id="lab_msa_CumulativeTraumaReportedClaimsMember_AC215769420A208BE5D0D45D375CF867_terseLabel_en-US" xlink:label="lab_msa_CumulativeTraumaReportedClaimsMember_AC215769420A208BE5D0D45D375CF867" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cumulative Trauma, Reported Claims</link:label>
    <link:label id="lab_msa_CumulativeTraumaReportedClaimsMember_AC215769420A208BE5D0D45D375CF867_label_en-US" xlink:label="lab_msa_CumulativeTraumaReportedClaimsMember_AC215769420A208BE5D0D45D375CF867" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cumulative Trauma, Reported Claims [Member]</link:label>
    <link:label id="lab_msa_CumulativeTraumaReportedClaimsMember_AC215769420A208BE5D0D45D375CF867_documentation_en-US" xlink:label="lab_msa_CumulativeTraumaReportedClaimsMember_AC215769420A208BE5D0D45D375CF867" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cumulative Trauma, Reported Claims [Member]</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_CumulativeTraumaReportedClaimsMember" xlink:label="loc_msa_CumulativeTraumaReportedClaimsMember_AC215769420A208BE5D0D45D375CF867" xlink:type="locator" />
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    <link:label id="lab_msa_ClaimsSettledButNotYetPaidMember_D6D683D09296CC347991D45D375C128C_terseLabel_en-US" xlink:label="lab_msa_ClaimsSettledButNotYetPaidMember_D6D683D09296CC347991D45D375C128C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Claims Settled, But Not Yet Paid</link:label>
    <link:label id="lab_msa_ClaimsSettledButNotYetPaidMember_D6D683D09296CC347991D45D375C128C_label_en-US" xlink:label="lab_msa_ClaimsSettledButNotYetPaidMember_D6D683D09296CC347991D45D375C128C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Claims Settled, But Not Yet Paid [Member]</link:label>
    <link:label id="lab_msa_ClaimsSettledButNotYetPaidMember_D6D683D09296CC347991D45D375C128C_documentation_en-US" xlink:label="lab_msa_ClaimsSettledButNotYetPaidMember_D6D683D09296CC347991D45D375C128C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Claims Settled, But Not Yet Paid [Member]</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_ClaimsSettledButNotYetPaidMember" xlink:label="loc_msa_ClaimsSettledButNotYetPaidMember_D6D683D09296CC347991D45D375C128C" xlink:type="locator" />
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    <link:label id="lab_msa_ClaimsAssertedButNotYetResolvedMember_D306D01FEFE970281F47D45D375DD51B_terseLabel_en-US" xlink:label="lab_msa_ClaimsAssertedButNotYetResolvedMember_D306D01FEFE970281F47D45D375DD51B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Claims Asserted But Not Yet Resolved</link:label>
    <link:label id="lab_msa_ClaimsAssertedButNotYetResolvedMember_D306D01FEFE970281F47D45D375DD51B_label_en-US" xlink:label="lab_msa_ClaimsAssertedButNotYetResolvedMember_D306D01FEFE970281F47D45D375DD51B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Claims Asserted But Not Yet Resolved [Member]</link:label>
    <link:label id="lab_msa_ClaimsAssertedButNotYetResolvedMember_D306D01FEFE970281F47D45D375DD51B_documentation_en-US" xlink:label="lab_msa_ClaimsAssertedButNotYetResolvedMember_D306D01FEFE970281F47D45D375DD51B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Claims Asserted But Not Yet Resolved [Member]</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_ClaimsAssertedButNotYetResolvedMember" xlink:label="loc_msa_ClaimsAssertedButNotYetResolvedMember_D306D01FEFE970281F47D45D375DD51B" xlink:type="locator" />
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    <link:label id="lab_msa_UninsuredCumulativeTraumaMember_6C28B41E1730B79476DAD45D375DB750_terseLabel_en-US" xlink:label="lab_msa_UninsuredCumulativeTraumaMember_6C28B41E1730B79476DAD45D375DB750" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Uninsured Cumulative Trauma</link:label>
    <link:label id="lab_msa_UninsuredCumulativeTraumaMember_6C28B41E1730B79476DAD45D375DB750_label_en-US" xlink:label="lab_msa_UninsuredCumulativeTraumaMember_6C28B41E1730B79476DAD45D375DB750" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Uninsured Cumulative Trauma [Member]</link:label>
    <link:label id="lab_msa_UninsuredCumulativeTraumaMember_6C28B41E1730B79476DAD45D375DB750_documentation_en-US" xlink:label="lab_msa_UninsuredCumulativeTraumaMember_6C28B41E1730B79476DAD45D375DB750" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Uninsured cumulative trauma.</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_UninsuredCumulativeTraumaMember" xlink:label="loc_msa_UninsuredCumulativeTraumaMember_6C28B41E1730B79476DAD45D375DB750" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProductLiabilityAccrualComponentAmount_38B38F3AE40B51AF5D8CD45D375ECF01_terseLabel_en-US" xlink:label="lab_us-gaap_ProductLiabilityAccrualComponentAmount_38B38F3AE40B51AF5D8CD45D375ECF01" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Product liability accrual</link:label>
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    <link:label id="lab_us-gaap_LossContingencyPendingClaimsNumber_6B65D8D2F132EA6EAE3ED45D375F1806_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyPendingClaimsNumber_6B65D8D2F132EA6EAE3ED45D375F1806" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of lawsuits</link:label>
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    <link:label id="lab_msa_LossContingencyYearsofActivity_CF5CCE2206101D3DA267D45D375F9053_terseLabel_en-US" xlink:label="lab_msa_LossContingencyYearsofActivity_CF5CCE2206101D3DA267D45D375F9053" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss contingency, years of activity</link:label>
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    <link:label id="lab_msa_MinimumNumberOfInsuranceCarriers_3D567CC6005071032B9FD45D3760865E_terseLabel_en-US" xlink:label="lab_msa_MinimumNumberOfInsuranceCarriers_3D567CC6005071032B9FD45D3760865E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of insurance carriers</link:label>
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    <link:label id="lab_us-gaap_InsuranceSettlementsReceivable_576456919373F5A66777D45D376084E5_terseLabel_en-US" xlink:label="lab_us-gaap_InsuranceSettlementsReceivable_576456919373F5A66777D45D376084E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Insurance receivables</link:label>
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    <link:label id="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompanies_343D32259CBA9E372B0DD45D3760F113_terseLabel_en-US" xlink:label="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompanies_343D32259CBA9E372B0DD45D3760F113" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Notes receivable from insurance companies</link:label>
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    <link:label id="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_330743C01F2EF9A8667DD45D37602950_terseLabel_en-US" xlink:label="lab_msa_NotesLoansandFinancingReceivableNetInsuranceCompaniesCurrent_330743C01F2EF9A8667DD45D37602950" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Notes receivable from insurance companies, current</link:label>
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    <link:label id="lab_msa_GainContingencyPolicyAllegedlyBreachedNumber_D80BC2EEF69CB8C712EFD45D3761C585_terseLabel_en-US" xlink:label="lab_msa_GainContingencyPolicyAllegedlyBreachedNumber_D80BC2EEF69CB8C712EFD45D3761C585" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain contingency, number of policies allegedly breached</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EntityWideRevenueMajorCustomerLineItems" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_730371C51E7A585491A5AAF6E8FC108F" xlink:type="locator" />
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    <link:label id="lab_msa_SalesThroughDistributors_864948DCFE6B93D554F7F2DAAA1B3499_terseLabel_en-US" xlink:label="lab_msa_SalesThroughDistributors_3252253134AF55E38208BE97E4D18CCF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sales through distributors</link:label>
    <link:label id="lab_msa_SalesThroughDistributors_864948DCFE6B93D554F7F2DAAA1B3499_label_en-US" xlink:label="lab_msa_SalesThroughDistributors_3252253134AF55E38208BE97E4D18CCF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sales Through Distributors</link:label>
    <link:label id="lab_msa_SalesThroughDistributors_864948DCFE6B93D554F7F2DAAA1B3499_documentation_en-US" xlink:label="lab_msa_SalesThroughDistributors_3252253134AF55E38208BE97E4D18CCF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sales Through Distributors</link:label>
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    <link:label id="lab_msa_ContractWithCustomerPercentageRetainedUntilCompletion_B4C0EABF770008C36265F2DAAA1BC943_terseLabel_en-US" xlink:label="lab_msa_ContractWithCustomerPercentageRetainedUntilCompletion_1DAB069F57AA56D68DEA935E6DF36F92" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract with customer, percentage retained until completion</link:label>
    <link:label id="lab_msa_ContractWithCustomerPercentageRetainedUntilCompletion_B4C0EABF770008C36265F2DAAA1BC943_label_en-US" xlink:label="lab_msa_ContractWithCustomerPercentageRetainedUntilCompletion_1DAB069F57AA56D68DEA935E6DF36F92" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract With Customer, Percentage Retained Until Completion</link:label>
    <link:label id="lab_msa_ContractWithCustomerPercentageRetainedUntilCompletion_B4C0EABF770008C36265F2DAAA1BC943_documentation_en-US" xlink:label="lab_msa_ContractWithCustomerPercentageRetainedUntilCompletion_1DAB069F57AA56D68DEA935E6DF36F92" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contract With Customer, Percentage Retained Until Completion</link:label>
    <link:loc xlink:href="msa-20180630.xsd#msa_ContractWithCustomerPercentageRetainedUntilCompletion" xlink:label="loc_msa_ContractWithCustomerPercentageRetainedUntilCompletion_1DAB069F57AA56D68DEA935E6DF36F92" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ContractWithCustomerAssetNet_813A2FFDE9CA7028A6D2F2DAAA1B388C_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetNet_3ACE140474535471A1453F3E57B0CA46" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract with customer, asset</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerAssetNet_813A2FFDE9CA7028A6D2F2DAAA1B388C_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetNet_3ACE140474535471A1453F3E57B0CA46" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Asset, Net</link:label>
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    <link:label id="lab_us-gaap_ContractWithCustomerLiability_CDCEE872469BC4C5FE3EF2DAAA1B8B00_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability_3B24BCCBE046534EB78B3216BF93A857" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract with customer, liability</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiability_CDCEE872469BC4C5FE3EF2DAAA1B8B00_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability_3B24BCCBE046534EB78B3216BF93A857" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ContractWithCustomerLiability" xlink:label="loc_us-gaap_ContractWithCustomerLiability_3B24BCCBE046534EB78B3216BF93A857" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1142CE92EC628EBFBB5CD3FE0A27E7C7_label_en-US" xlink:label="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_D67B31CC74D151E284C3DAD64DABA0BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_D67B31CC74D151E284C3DAD64DABA0BA" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_74BCA8E98FF61887E7F0D3FE0A2766B8_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_E387BE104760502D90E61F4404EF179F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_74BCA8E98FF61887E7F0D3FE0A2766B8_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_E387BE104760502D90E61F4404EF179F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Type [Axis]</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_4EE306BADFEA3B0E4430D3FE0A273C12_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_FDE3731544A35DF9BD322035AA913A2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Type [Domain]</link:label>
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    <link:label id="lab_us-gaap_LandMember_EE324FEB5A1435CCF5DED3FE0A270A8C_terseLabel_en-US" xlink:label="lab_us-gaap_LandMember_52C01D5542165D4581B8DA6E86747CA5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Land</link:label>
    <link:label id="lab_us-gaap_LandMember_EE324FEB5A1435CCF5DED3FE0A270A8C_label_en-US" xlink:label="lab_us-gaap_LandMember_52C01D5542165D4581B8DA6E86747CA5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Land [Member]</link:label>
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    <link:label id="lab_us-gaap_BuildingMember_BBDED4921F8AC165FF10D3FE0A277FEA_terseLabel_en-US" xlink:label="lab_us-gaap_BuildingMember_EEB4FF1756D453A3A831915BCDCB0E08" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Buildings</link:label>
    <link:label id="lab_us-gaap_BuildingMember_BBDED4921F8AC165FF10D3FE0A277FEA_label_en-US" xlink:label="lab_us-gaap_BuildingMember_EEB4FF1756D453A3A831915BCDCB0E08" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Building [Member]</link:label>
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    <link:label id="lab_us-gaap_MachineryAndEquipmentMember_AD666A56A74079A8D5D5D3FE0A27C258_terseLabel_en-US" xlink:label="lab_us-gaap_MachineryAndEquipmentMember_FE964C11740C509FB1F1EA95DD1C5875" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Machinery and equipment</link:label>
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    <link:label id="lab_us-gaap_ConstructionInProgressMember_8C9DC9BF75DA95AE8C2CD3FE0A274E96_terseLabel_en-US" xlink:label="lab_us-gaap_ConstructionInProgressMember_9603A5F46B2855D38FDD6E1BEAD730BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Construction in progress</link:label>
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