A sturdy, durable double boot for high altitude mountaineering * The thermo-formable inner boot sports the patented speed lacing system and couples with the highly insulated multi-layered PE outerboot for dependable warmth and a PU coating to keep moisture and cold outside and heat inside the boot. * High abrasion resistant Cordura * Ideal for use on 6-7000 meter peaks or in harsh winter conditions where you don"t want to think about your feet. * IDEAL TERRAIN: 6000-7000 meter peaks or high cold mountaineering conditions