6 oz., 100% USA cotton; Heathers and Safety colors are 50/50; Ash Grey is 99/1; Sport Grey & Antiques are 90/10; Made with sustainably and fairly grown USA cotton; Tear away label; Double-needle sleeve and bottom hem; Seamless double-needle 7/8" collar; Taped neck and shoulders; Safety Green is compliant with ANSI / ISEA 107 high-visibility standards; 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;