This Ultimate V-Neck T-Shirt is 4.3 Oz. and made of 100% preshrunk, combed, ringspun cotton. Athletic Heather Gray is 90/10 cotton/polyester. Charcoal Heather & Graphite Heather Gray is 50/50 cotton/polyester. Features fashionable mitered-v rib collar with shoulder-to-shoulder taping, double-needle sleeve and bottom hem, NAFTA compliant and a tearaway label. Complies with Prop 65.