Technical boot recommended for extreme winter on high altitude mountaineering, classic mountaineering and Ice Climbing. Removable inner boot and upper thermally insulated to maintain an optimal temperature of the foot.Upper: MicrofibreGaiter: Stretch Cordura®Lining: Gore-Tex® Insulated Comfort Footwear and Primaloft®Insole: Semi rigid CarbonRemovable Footbed: CRISPI® Air Mesh EVO + Active Carbons. Removable footbed with antiperspiration anti/odour action. Top comfort thank to the CRISPI® 3D ConstructionProtections: Rubber randSole: Vibram® with shock absorbing midsole, crampons compatibleWeight : 990g