8 oz./yd² (US) 13.3 oz./L yd (CA), 50/50 cotton/polyester, 20 singles Heather Sport colors are 60/40 polyester/cotton Safety Green is compliant with ANSI / ISEA 107 high-visibility standards Classic fit 1x1 rib with spandex for enhanced stretch and recovery Tear away label Proud member of the U.S. Cotton Trust Protocol