12.5-ounce, 98% Cotton/2% Spandex FR denim Meets the performance requirements of NFPA 70E/ASTM F1506 UL® classified to NFPA 2112 Built to move with Rugged Flex® stretch technology Sits slightly below the waist Comfortable fit through the seat and thigh with more room to move Straight leg opening Brass zipper fly with Nomex® FR zipper tape Arc-resistant button closure at waist Stronger sewn-on-seam belt loop Carhartt FR label sewn on back pocket NFPA 2112/CAT 2 label sewn on waistband Two reinforced back pockets Imported