La Sportiva Women's Trango S Evo GTX Mountaineering Boots 70% Waterproof Cordura / 20% Water-repellant Lori All synthetic and designed for spider like alpine climbing performance; it is waterproof and ready for a semi-automatic crampon. The Vibram Mulaz outsole, has an edging platform and sticky Supertrek Rubber. The 3D Flex ankle provides supreme ankle maneuverability for technical routes. IDEAL TERRAIN: 3 season alpine climbing