A great combination of durability, comfort, and protection. Resists flash fire and arc flash, but never hard work. It's not just what you want, it's what you need. Made from 13-ounce, 100 percent cotton FR duck and features a high back with FR elastic suspenders and FR center-release buckles, the chap-style double-front enhances durability, has a brass zipper fly with Nomex FR zipper tape, FR melamine buttons at waist, multiple tool and utility pockets, ankle-to-above knee brass leg zippers with Nomex FR zipper tape and protective flaps with arc-resistant snap closures, has the Carhartt FR and NFPA 2112/HRC 2 labels sewn on front pocket and it meets the performance requirements of NFPA 70e standards and is UL classified to NFPA 2112.