Upper: Full grain durable and water resistant blcak leather Outsole: Vibram Fuora anti-clog for maximum traction and stability Lower Midsole:PU with full heel to toe shock-absorbing for fatigue relief and comfort Upper Midsole:Curved graduated flex nylon Pressure releiving ankle cuff Achilles releif pad on rear upper Air pulse breathing system for added comfort and boot drying Lacing System: Rustless D-ring around ankle, with ball bearing eyelets over instep/toe area for rapid and effective volume adjustment