Wolverine Men's Size 11 Medium Width 6" Brown Durbin Boot is a waterproof work boot with a nubuck leather upper, moisture managing mesh with waterproof membrane lining, removable open cell PU cushion foot bed, advanced comfort PU midsole, rubber lug outsole, nylon shank, opanka construction, steel toe ASTM F2413-11 M I/75 C/75 Eh, M 7-12, 13, 14, EW 7-12, 13, rated for steel toe & electrical hazard.