FEATURES of the La Sportiva Men’s Karakorum Boot 2.8mm Idro-Perwanger leather uppers withstand years of abuse Aggressive vibram sole with semi-automatic crampon attachment for alpine climbing Multi-directional 3D flex hinge promotes easy flex and a faster break in period SPECIFICATIONS of the La Sportiva Men’s Karakorum Boot Weight: 30.97 oz / 878 g Outer Boot: 2.8mm Idro-Perwanger Roughout Leather/ Vibram rubber rand/ Cordura cuff Lining: Dry-Best Insole: 8mm high density Nylon with anti-torsion plate Midsole: SBR Aircushion Sole: Vibram Couloir Construction: Board Lasted Last: Makalu This product can only be shipped within the United States. Please don’t hate us.