6 oz., 100% USA cotton; Ash Grey is 99/1; Sport Grey is 90/1; Dark Heather, Safety Green and Safety Orange are 50% cotton, 50% polyester; Made with sustainably and fairly grown USA cotton; Double-needle stitching throughout; Taped shoulder-to-shoulder; Ribbed cuffs; Gildan's manufacturing process utilizes 45% renewable energy; Gildan?s Community Investment Program supports education, the environment, humanitarian aid and active living in the communities we do business in