N-Ferno 6471 M Black Thermal BibsErgodyne Ei 41213 These insulated bibs overalls provide the ultimate in durability, weather protection, and quality outerwear. Complete with removable knee shin pads and 1600D nylon reinforcement in heavy wear areas. Features Rugged 500D Nylon outer shell provides protection from the elements wind, repelling water, and keeping cold out 1600D Nylon reinforcement zones in heavy wear areas to hold up through the toughest conditions Several pockets