6 oz.(US) 10 oz.(CA), 100% preshrunk cotton Ash Grey: 99/1 cotton/polyester Heather colors & Safety colors: 50/50 cotton/polyester Antique colors & Sport Grey: 90/10 cotton/polyester Classic fit Seamless double needle 7/8" collar Taped neck and shoulders Double needle sleeve and bottom hems Quarter-turned to eliminate center crease Safety Green: Compliant with ANSI / ISEA 107 Tearaway label