Please click for the La Sportiva Size Conversion. The La Sportiva G2 SM boot has a lightweight yet warm construction that is ideally suited for mountaineering and cold environments. The outer boot features a water-repellent cordura and insulating perforated felt design with low density expanded PE foam, thermo-reflective aluminum for added warmth. Water-repellent Lorica with Antiacqua external coating. Dual Boa closure system for a secure. Gaiter is made with a elastic Cordura cuff, Cordura with laminated and taped water-resistant membrane. Zip closure with easy-to-grip nylon pull loop. Air-injected rubber rand for added protection. Inner boot features 6mm PE + EVA single density foam, a Cordura Flex Zone for excellent flexibility and a dual hook-and-loop closure for secure fit with easy adjustability. Cushioned footbed with 3mm Honeycomb Tech insulating carbon for lightweight underfoot protection. 2mm polyurethane midsole is graded for crampon attachment. Durable Vibram Matterhorn outsole with Impact Brake System featuring proprietary technology in the outsole design with the lugs of the soles oriented in opposing slanted directions, increasing braking power by an average of 20 percent and decreasing impact forces by an average of 20 percent. Made in Italy. Measurements: Weight: 2 lbs 7 oz Shaft: 12 in Product measurements were taken using size 45 (US Men~s 11.5), width Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.