The Koflach Arctis Expe is designed for the coldest climbing conditions particularly suitable for high altitudes, low temperatures and expeditions. Rugged and warm shell liner construction. Comes with high altitude liner and a heat reflective insole for maximum warmth. Vario cuff articulation allows natural fore and aft flex. Rubber randing absorbs impact and improves climb ability. Steel roller lacing provides unequaled tightening without exertion. Vibram Dhaulagiri sole is optimal for high alpine use combining climbing 'zones', stability 'zones' and brake 'zones' for true all mountain function. Y Technology combines rigid plastic for support and secure crampon attachment with supple plastic for ease of lacing and natural walking comfort. Pebax plastic is light and strong in any temperature. Weight: 2 lbs. 14 oz. one boot, size 8.