Made of 9 oz. FR twill, a blend of 88% Cotton and 1% high-tenacity nylon. Sits slightly below the natural waist. Full seat and thighs. Triple-stitched main seams. Arc-resistant button closure at waist. Brass zipper fly with Nomex FR zipper tape. Two reinforced back welt pockets. 19 3/4-inch leg openings fit over work boots. Carhartt FR label sewn on back pocket. HRC 2 label sewn at waistband near front coin pocket. NFPA 70E compliant; Amplitude Flame-resistant fabric by Milliken.