Made of 11.75-ounce, 100% cotton FR denim. Sits slightly below the natural waist. Relaxed fitting seat and thighs. Garment washed for soft hand. Arc-resistant button closure at waist. Brass zipper fly with Nomex zipper tape. Two reinforced back pockets. Double-stitched main seams. Leg openings fit over boots. NFPA 70E and NFPA 2112 compliant. Flame-resistant fabric by Mount Vernon Mills.