13-ounce, 99% cotton / 1% elastane FR duck Meets the performance requirements of NFPA 70E and ASTM F1506 UL® classified to NFPA 2112 Rugged Flex® durable stretch technology for ease of movement High back with suspenders and FR buckles FR melamine buttons at waist Multi-compartment bib pocket with secure zipper closure Multiple tool and utility pockets Lower-front ledge pockets Two reinforced back pockets Stretch side panels for increased range of motion and comfort Double-layer knees with openings for adding knee pads and cleaning out debris Ankle-to-knee brass leg zippers with Nomex® FR zipper tape and protective flaps with arc-resistant snap closures Triple-stitched main seams Imported