Wolverine Durashocks Poronxrd Internal Metatarsal Guard Boot. Made of full grain leather PoronXRD met upper. Features wave mesh lining, 3D ortholite insert with NXT odor control sockliner footbed, polyurethane midsole. Wolverine Durashocks Vibram rubber lug outsole. Nylon shank and direct attach construction. Steel toe version is rated ASTM F2413-11 M I/75 C/75 EH. Material: Leather.