High-abrasion heel counter that helps keep your heel in place, so it's not shifting around as you walk. Guaranteed Rocky Waterproof construction. Polyurethane Footbed. TPU Torsion stabilizer. Widest oblique toe box in the industry. Oil- and slip-resistant, 3-density EVA midsole and rubber Mobilite outsole. ASTM F2413 protective toe classification. ASTM F2413 electrical hazard standard. 2 Inch heel.