The Koflach Arctis Expe is designed for the coldest climbing conditions; particularly suitable for high altitudes, low temperatures and expeditions.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)..