Please click for the La Sportiva Size Conversion. Take in all of Mother Natures breath taking beauty in a pair of these Karakorum mountaineering and backpacking boots from La Sportiva. Ideal boots for NOLS and Outward Bound courses. Features 2.8mm Idro-Perwanger leather uppers withstand years of abuse. Vibram rubber rand. Padded Cordura cuff. Dry-Best lining. 8mm high-density nylon with anti-torsion plate. SBR Aircushion midsole. Makalu board construction. Multidirectional 3D Flex hinge promotes easy flex and faster break-in period. Aggressive Vibram Couloir sole with semiautomatic crampon attachment for alpine climbing. Measurements: Weight: 2 lbs 3 oz Product measurements were taken using size 43 (US Mens 10), width D - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.