Ideal boot recomended for technical Himalayan mountaineering high altitude expedition on extreme temperatures. Structured in three layers to maintain maximum thermal insulation. Removable inner boot thermal and breathable. Upper in highly resistant nylon and external gaiter in Cordura® to obtain the highest abrasion resistance.Upper: Reinforced high strength nylonGaiter: Cordura® + High abrasion resistant fabricLining: PE and aluminiumInsole: Rigid CarbonRemovable Footbed: CRISPI® Air Mesh EVO + Felt + Active Carbons. Outstanding breathability and anti perspiration – anti odour action. The CRISPI® 3D construction transports moisture away leaving the foot drySole: Vibram® Telealp CramponableWeight : 1280g