Please click for the La Sportiva Size Conversion. The Trango Ice Cube GTX boot by La Sportiva is technically advanced and on the cutting edge of seamless technology. Its lightweight design has a durability and protective comfort that will keep you going on any outdoor adventure. Seamless, waterproof upper made of QB3 waterproof fabric and Flex Tec2 fabric. Gore-Tex Performance Comfort lining keeps moisture out while still providing excellent breathability for a dry foot environment. Thermo-Tech injection TPU lacing system with PU eyelets delivers a secure and comfortable fit. Integrated removable tongue made from a soft stretch fabric to provide maximum comfort and easy movement. Vibram rubber rand protect the front of the foot from rocks and debris. 4mm graded nylon insole provides lightweight cushioning and support. Cushioned EVA midsole with protective PU in the toe and heel area, and a TPU insert for the crampon attachment. La Sportiva One by Vibram outsole with Impact Brake System. Built on a Trango last. Made in Italy. Measurements: Heel Height: 1 1 2 in Weight: 1 lb 9 oz Shaft: 7 in Product measurements were taken using size 45 (US Mens 11.5), width Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.