13 ounce, 100% cotton flame-resistant duck with a 6 ounce twill lining. Two inside patch pockets with flame resistant hook-and-loop closure. Nomex® rib-knit cuffs and waistband. Brass front zipper with Nomex® zipper tape that has inside and outside protective flaps and hidden snap closure for electric arc protection. NFPA 70E compliant. Colours: brown and dark navy.