Arc Rating ATPV 11 calories/cm2FABRIC Flame-resistant EXCEL FR? 9-ounce 100% cotton twill.FEATURES Meets IL50 industrial laundry standards. One-piece topstitched lay-flat collar. Two-way concealed Nomex?-taped brass breakaway zipper with a concealed snap at the top of the zipper and at neck. Open hem sleeves. Two set-in front pockets. Left chest pocket. Two patch hip pockets. Side vent openings.STANDARDS This flame-resistant garment meets the requirements of NFPA 2112 Standard on Flame-Resistant Garments for Protection of Industrial Personnel Against Flash Fire 2012 Edition; EN ISO 11612:2008 Protective Clothing Against Heat and Flame; EN 340:2003 Protective Clothing–General Requirements; and IEC 61482-2:2009 Live Working–Protective Clothing Against the Thermal Hazards of an Electric Arc.