6 oz./yd², 100% cotton, 18 singles; Safety Green is 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; Seamless double needle 7/8" collar; Double-needle sleeve and 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.;