Carhartt® flame-resistant bib overall is unlined for comfort in warmer weather. Made of 13-oz. flame-resistant 100% cotton duck to protect wearer from burns caused by electric arc or flash fires. NFPA 70E compliant. Features high back with flame-resistant elastic suspenders and high-temperature nylon center-release buckles. Also has chap-style double front for durability, multiple tool and utility pockets, hammer loop, ankle-to-thigh brass leg zippers with Nomex® zipper tape, flame-resistant melamine button at waist, protective flaps and arc-resistant snap closures. Model# FRR45. Big style available in 52 and 54 waists. Available in 30 and 32 inseams. Expanded range of sizes available on NorthernTool.com.