5.2 oz. 50% combed ring-spun cotton, 50% polyester pre-shrunk jersey; Denum Heather, Oxford: 5.2 oz. 60% carded ring-spun cotton, 40% polyester; Made with sustainably-sourced, USA-grown cotton; Moisture-wicking for all-day comfort;Seamless 1x1 rib collar with clean neckline; Shoulder-to-shoulder taping; 1x1 rib cuffs; Classic fit; Tear-away label; Committed to having WRAP certified facilities, being proud members of Better Cotton Initiative, and the US Cotton Protocol;