8.5-ounce FR canvas: a blend of 88% cotton and 12% high-tenacity nylon. 6-ounce twill-face cloth lining. Two lower-front pockets. Two inside patch pockets with FR hook-and-loop closures. Nomex rib-knit cuffs and waistband. Brass front zipper with Nomex tape plus inside and outside protective flaps plus hook-and-loop closure for electric-arc protection. Carhartt FR label sewn on front pocket, HRC 2 label sewn on zipper flap. NFPA 70E compliant. Flame-resistant fabric by Mount-Vernon Mills.