9-ounce, 98% cotton/2% spandex canvas 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 Stronger sewn-on-seam belt loops Carhartt FR label sewn on back pocket; NFPA 2112/CAT 2 label sewn on coin pocket Right-leg secured cell phone pocket Left-leg multi-utility pocket Imported