Add warmth to Carhartt's workwear with Carhartt's flame-resistant duck bib overalls. Made of 13-ounce, flame-resistant 100% cotton duck, it features a quilt lining, a high back with flame-resistant elastic suspenders and high temperature nylon center-release buckles. They also have a chap-style double front for durability, flame-resistant melamine button at waist, multiple tool and utility pockets, hammer loop, ankle-to-mid-thigh brass leg zippers with Nomex zipper tape and protective flaps and arc-resistant snap closures. NFPA 70E compliant. Read more about Carhartt's flame-resistant line.13-ounce, heavyweight, flame-resistant 100% cotton duck Quilt-lined NFPA 70E compliant Click Here For Technical Information