13-ounce 99% cotton / 1% elastane FR duck - Meets the performance requirements of NFPA 70E and ASTM F1506 - ULA' classified to NFPA 2112 - CAT 2 - 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