Winter alpinism at high altitude, alpine activity until 6500 m, ice falls and classic alpinism. Phantom 6000 is a boot with a removable inner boot, Microtech upper and a gaiter. The inner boot has a Primaloft® lining and an outside part in 4mm thermo-insulating EVA. The gaiter is made of three different materials, elastic S-Tech on the pressure points on the foot instep and in the back area; internal area made of run-resistant Super-Fabric and external part made of Nylon and Kevlar. The gaiter has an Outdry® breathable membrane, laminated directly on the internal surface.