5.5 oz./yd², 100% soft spun cotton, 20 singles; Athletic Heather is 90% cotton, 10% polyester; Heather colors are 50% cotton, 50% polyester; Made with sustainably and fairly grown US cotton;Set-in rib collar with shoulder-to-shoulder taping; 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.;