7 oz. Amtex FR 88% Cotton 12% Nylon Twill. True to size fit. Button front and button down banded collar. Two button cuffs and box pleat back. Two chest pockets with button flaps. Flash fire rated meets NFPA 2112. Exterior Tyndale FR arc rating and HRC labels.-Arc rating E BT 8.6 calories/cm 2 -Hazard Risk Category (HRC): 2