Developed in collaboration with world-renowned Italian alpinist Simone Moro, the G2 SM Boot from La Sportiva is a technical, warm, extremely lightweight double boot, that is the ultimate must have for mountaineering. Using the Dual Boa Closure System for the upper and lower sections of the inner boots, you get an excellent fit that can be adjusted to suit you and the conditions you face in a matter of seconds. Vibram\'s Matterhorn sole keeps your feet where you left them, with Impact Brake System to help your acsents and decents go without a hitch. A honeycomb carbon fibre insole keeps the weight down, but still provides you with a fit like no other. Features Materials: Outer boot: Cordura, insulating perforated felt, low density expanded PE foam, Thermo-reflective aluminium, Lorica Inner boot: 6mm PE and EVA single density foam, Cordura flex zone, dual velcro closure Insole: 3mm Honeycomb Tech insulating carbon Midsole: 2mm Polyurethane graded for crampon attachment Outsole: Vibram Matterhorn with Impact Brake System Integrated gaiter provides maximum water resistance, warmth and durability Quick drying Precise Dual Boa Closure System for locked down secure lacing Weight: 2,050g