10 oz./lin.yd., 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; 2?" longer in length; 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