Flame-repellent, water-repellent, and tough as nails, these men's midweight overalls are ready for the most rugged work environments. They're made of Quick Duck® canvas, which is lighter than our traditional sandstone duck but ounce-for-ounce just as tough. Born for the cold, they have a quilt lining to the waist as well as insulation throughout. A double layer at the knees makes them durable enough for kneeling in the mud or snow. 8.5-ounce, 88% cotton / 12% nylon FR Quick Duck® 150g 3M™ Thinsulate™ Platinum FR insulation Meets the performance requirements of NFPA 70E UL® classified to NFPA 2112; Carhartt FR and NFPA 2112 labels sewn on front pocket High back with FR suspenders and FR side-release buckles Multi-compartment bib pocket with zip closure Brass zip fly with Nomex® FR zipper tape; AFR melamine buttons at waist Two large lower-front pockets; Two reinforced back pockets Articulated knees for ease of movement Double-layer knees with openings for adding knee pads and cleaning out debris Brass leg zips with Nomex® FR zipper tape and protective flaps with arc-resistant snap closures Model No. OR2691-FRM Country of Origin: Imported Carhartt FR Bibs - Full Swing® Insulated 102691