FEATURES of the La Sportiva Makalu Boot MtnFlex insole and full steel shank for automatic crampon compatibility Rollerball hardware and locking d-ring for independent fit Burly rough out leather uppers for years of abuse SPECIFICATIONS of the La Sportiva Makalu Boot Weight: 34.57 oz / 980 g Outer Boot: 3mm Idro-Perwanger Roughout Leather/ Vibram rubber rand/ removable EZ Flex tongue with Dry-Best lining Lining: Dry-Best Insole: 8mm MtnFlex with 1.5mm Dacromet-coated full steel shank Midsole: SBR Aircushion Sole: Skywalk MPE Construction: Board Lasted Last: Makalu This product can only be shipped within the United States. Please don"t hate us.