Lowa Men's Khumbu Mid GTX Trekking Boot 100% Split leather and cordura Excellent ankle support for uneven rocky terrain and ultra-comfortable trekker with mid-weight (30-50) pound packs Split leather and Cordura uppers with GORE-TEX waterproof lining Exclusive Vibram Pinto sole unit Polyurethane and EVA midsole with patented SPS (Supination/Pronation Support) System