6 oz./yd?, 100% cotton, 18 singles; Charcoal Heather and Safety Green are 50% cotton, 50% polyester; Ash is 99% cotton, 1% polyester; Athletic Heather is 90% cotton, 10% polyester; Made with sustainably and fairly grown US cotton; Set-in rib collar with shoulder-to shoulder taping; Rib sleeve cuffs; Double-needle bottom hem; Preshrunk; Tear away label; American Apparel’s manufacturing process utilizes 45% renewable energy; American Apparel?, through Gildan?s Community Investment Program, supports education, the environment, humanitarian aid and active living in the communities we do business in.;