101627-410 Carhartt Men's FR Duck Bib Overall - Dark Navy Since 1889, Carhartt has been creating heavy-duty gear for people facing the toughest tasks. These men's bib overalls help you stay safe and comfortable on the job with flame-resistant cotton duck. They have ankle-to-thigh zips to give you quick ventilation and a durable double-front design made with your knee pads in mind. Loose fit Meets the performance requirements of NFPA 70E / ASTM F1506 UL classified to NFPA 2112 High back with FR elastic suspenders and FR side-release buckles FR melamine buttons at waist Carhartt FR and NFPA 2112 / CAT 2 labels sewn on front pocket Multi-compartment bib pocket Two large lower-front pockets Two reinforced back pockets Double-layer knees with openings for adding knee pads and cleaning out debris Ankle-to-knee brass leg zips with FR zipper tape and protective flaps with arc-resistant snap closures Fabric 13-ounce | 100% Cotton FR Duck