Dunham’s "8000 Works" six-inch boot has rugged leather and synthetic uppers that are seam-sealed with waterproof membrane, removable dual density footbeds and cushioned EVA midsoles. The oil-resistant treaded outsole is slip-resistant, too (meeting ASTM F1677, Mark II wet/dry standards), and is reinforced with stabilizing R-BarTM. Nylon shank. Men’s sizes 7–12, 13, 14, 15, 16 and 17 in 4E; 8–12, 13, 14, 15 and 16 in 6E.