We have two reportable segments, REVOLVE and FORWARD, each offering clothing, shoes, accessories, and beauty products available for sale to customers through their respective websites. Our reportable segments have been identified based on how our chief operating decision makers manage our business, make operating decisions, and evaluate operating performance. Our chief operating decision makers are our co-chief executive officers. We evaluate the performance of our reportable segments based on net sales and gross profit. Management does not evaluate the performance of our reportable segments using asset measures.

Revenue from external customers for each group of similar products and services is not reported to our chief operating decision makers. The separate identification for purposes of segment disclosure is impracticable, as it is not readily available and the cost to develop would be excessive. During the years ended December 31, 2019, 2018 and 2017, no customer represented over 10% of net sales.

The following table summarizes our net sales and gross profit for each of our reportable segments (in thousands):

	Years Ended December 31,
	2019		2018		2017
Net sales
REVOLVE	$	527,251	$	433,548	$	330,577
FORWARD		73,742		65,191		69,020
Total	$	600,993	$	498,739	$	399,597

Gross profit
REVOLVE	$	292,042	$	241,061	$	169,070
FORWARD		29,911		24,245		24,620
Total	$	321,953	$	265,306	$	193,690

All of our long-lived assets and goodwill are located in the United States as of the years ended December 31, 2019, 2018 and 2017. The following table lists net sales by geographic area (in thousands):

	Years Ended December 31,
	2019		2018		2017
United States	$	502,882	$	409,320	$	324,622
Rest of the world ⁽¹⁾		98,111		89,419		74,975
Total net sales	$	600,993	$	498,739	$	399,597

(1)	No individual country exceeded 10% of total net sales for any period presented.