6 oz., 100% USA cotton; Sport Grey is 90/10; Safety Green is 50/50; Made with sustainably and fairly grown USA cotton;Double-needle stitching throughout; Seamless collar; Taped shoulder-to-shoulder; 2½" longer in length; 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 business in;