Made of 13 oz., 100% cotton flame-resistant duck with a 11.5 oz. flame-resistant quilt lining. Features (2) inside patch pockets with flame-resistant hook-and-loop closure for convenient storage and Nomex® rib-knit cuffs and waistband. Also features brass front zipper with Nomex zipper tape with inside and outside protective flaps and hidden snap closure for electric arc protection. Arc rating: 54.3 cal/cm², CAT2. NFPA 70E compliant.