Inov-8 Men's Trailroc 255 Grey/Blk/Red-M, Black, 12.5 W US 100% Synthetic/Thermoplastic Polyurethane Imported Standard Fit Rubber sole Trail running shoe with injected EVA foam midsole and aggressive TRAILROC outsole Heel-to-toe drop: 6mm Meta-Shank II rock protection and support