The warmest and lightest model on the market, built with the best materials available. Anti-abrasion Cordura® fabric, capable of capturing UV rays by heating the hull. Lined gaiter coupled with a waterproof, windproof membrane. Oblique zipper with polyurethane coating with watertight closure for easy opening and closing with gloves. 1.6mm thick rubber edge, anti-wear and anti-scratch. Internal structure in Cordura® coupled with EVA and aluminum film with Velcro® closure for a comfortable fit of the foot. Thermal multi-layer liner, ultra-light, lined with aluminum, absorbent felt and Primaloft® thermal wadding. Non-slip insole. The carbon insole combined with the Aerogel® insole reaches the highest standards of lightness and insulation.