Walls Men's Flame Resistant Insulated Bomber Jacket 88% Cotton/12% Nylon Machine Wash Arc Rating, ATPV-37.5cal/cm, HRC Level 3 10 oz. 88% cotton/12% high tenacity nylon duck shell 11 oz. FR modacrylic insulation quilted to FR twill lining Bi-swing back Garment, fabric and trims aare NFPA 2112 UL certified