5.3 oz., 100% USA cotton; Ash Grey is 99/1; Sport Grey is 90/1; Dark Heather, Safety Green, Safety Orange & Safety Pink are 50% cotton. 50% poly; Made with sustainably and fairly grown USA cotton; Seamless rib at neck; Taped shoulder-to-shoulder; Double-needle stitching throughout; Tear away label; 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 bus