Carhartt's flame-resistant duck bib overall is made of 13 ounce FR cotton duck. It features FR quilt lining. Construction includes a high back with FR elastic suspenders and FR center-release buckles plus a chap-style double front to enhance durability. The leg zippers go ankle to thigh for easy on and off and feature Nomex FR zipper tape and protective flaps with arc-resistant snap closures. The men's flame-resistant overalls meet NFPA 70E standards.Carhartt has been making workwear for hardworking folks since 1889 and is a name you can count on to deliver high-quality, long-lasting apparel and footwear for any line of work.