La Sportiva Trango S Evo GTX Mountaineering Boot - Men's Synthetic Ideal Terrain: 3 season alpine climbing Upper: Water-repellant Cordura&reg; with Idro-treatment/ Flex Tec 2/ Water-repellant Lorica&reg; with Antiacqua&trade; / Vibram&reg; rubber rand; Lining: Gore-Tex&reg; Insole: 7mm Trangoflex with integral Nylon&reg; shank; Midsole: Micropore (forefoot)/ PU (heel)/ TPU crampon reinforcement in back; Sole: Vibram&reg; Mulaz (Sticky Supertrek Rubber) Last: Trango Weight: 26.17 oz / 742 g