La Sportiva Makalu Mountaineering Boots - Men's Natural 42.5. This classic leather mountaineering boot features the La Sportiva MPEvo outsole to ensure stability and traction in rugged environments. La Sportiva used a burly 3.0mm Idro-Perwanger Roughout Leather upper for classic mountain boot performance and fit. This is a full steel shank boot that will accept an automatic crampon and kick steps in snow all day without a crampon if needed. Additionally the protective Vibram rubber rand adds excellent toe protection and the EZ rollerball hardware makes these boots easy to lace up. Specifications for La Sportiva Makalu Mountaineering Boots - Men's: Manufacturer: La Sportiva Gender: Male Age Group: Adults Men's Shoe Width: Medium Color: Natural Footwear Type: Boots Activity: Climbing Weight: 34.57 oz Footwear Closure: Laces Fabric/Material: Leather Footwear Upper Fabric/Material: Idro-Perwanger Roughout Leather Insole Material: MtnFlex Lining Material: Dry-Best Outsole Material: MPEvo Features of La Sportiva Makalu Shoes Classic mountaineering boot Durable idro-perwanger leather uppers Package Contents: La Sportiva Makalu Mountaineering Boots - Men's La Sportiva 31G-812812-42.5: Makalu Mountaineering Boots - Men's Natural 42.5