6 oz., 100% USA cotton; Ash Grey is 99% cotton, 1% poly; Sport Grey is 90% cotton, 10% poly; Made with sustainably and fairly grown USA cotton; Banded neck and armholes; Double-needle stitching on bottom hem; 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