The Edge fuses Wolverine's innovative technologies for the ultimate combination of comfort and performance.The multi-layer construction of EPX technology conserves and returns energy. The Edge also features Waterproof Plus breathable membrane, waterproof nubuck leather upper, moisture managing mesh lining with waterproof membrane, removable dual-density PU EPX Anti-Fatigue footbed, ultra-light compression molded EVA and PU midsole, rubber lug outsole, and nylon shank. Material: Leather.