La Sportiva - Trango Extreme EVO GTX (Yellow/Black) - Men's: A technical lightweight winter climbing boot for mountain big walls and winter alpine routes. The svelte low-profile Trango design is 25% lighter than the Nepal making it ideal for fast and light alpine outings where every ounce is scrutinized and big-wall forays where every ounce is hauled one way or another. Multi-directional 3D Flex ankle coupled with a climbing shoe inspired lacing system allows for amazing flexibility in the ankle and painless crack climbing performance. Hytrel midsole and Vibram flat sole brings the outsole edge directly underneath the edge of your foot for precision edging. Outsole is made with sticky Supertrek rubber and has an edging platform for technical rock climbing performance. 2.6mm Idro-Perwanger leather upper. Water repellant Lorica with Antiacqua external coating. Board lasted construction. Trango last. GORE-TEX lining. Vibram Lavaredo (sticky Supertrek rubber) outsole. 6-7mm HP3 midsole. 9mm insulating Ibi-Thermo insole.