A general mountaineering and heavy backpacking boot,IDEAL TERRAIN: general mountaineering and heavy backpacking.,WEIGHT: 30.97 oz/ 878 g,LAST: Makalu. UPPER: 2.8mm Idro-Perwanger Roughout Leather/Vibram rubber rand. Cordura cuff,LINING: Dry-Best. INSOLE: 8mm high density Nylon with anti-torsion plate. MIDSOLE: SBR Aircushion. SOLE: Vibram Couloir. SIZES: 38-48 (half sizes).