Flame Resistant Work Jacket it's made with a flame resistant duck canvas that's 90% Pima cotton and 10% 375 gram high tenacity nylon. In addition to duck canvas' inherent wind, snag, and water resistance, the Pima cotton is soft and comfortable against your skin. The nylon adds strength and abrasion resistance. All this makes this fire zero jacket a very tough item. What makes it flame resistant is Wolverine's double dipping process. By dunking the garment in their flame resistant treatment twice, they ensure the entire garment is fully rendered flame resistant. And to hold everything together, this canvas duck jacket is sewn with 11 ounce aramid high tenacity flame resistant thread. All the metal in it is thermally protected from your skin, so you won't get burned if the zipper heats up. The protective stand up collar with a snap closure helps protect your neck, while the storm guard with snap closure helps keep the zipper area free of debris, rain, or flames. Two pockets with flaps and snap closures gives you secure storage. Standards: HRC4. Arc Rating: ATPV 54.7 cal/cm2. NFPA 70E-2004, NFPA 1975-2009, ASTMF 1506-2010a, et OSHA 29 CRF1910.269. CAN/CGSB 155.20-2000, CAN/CGSB 155.22-97, EN ISO11611:2008, EN ISO11612:2008, EN ISO 14116:2008. Material: Pima Cotton, Nylon.