Featuring the modern, lightweight trail performance of the Hydrogen with additional ankle support for fastpacking, overnights or more rugged terrain, the Hydrogen Hike GTX offers essential support and GORE-TEX(R) Surround(R) weather protection in a streamlined, supportive and incredibly breathable package. Its mid-height upper offers extra stability, with mesh paneling for added breathability. AN EVA sole cushions shock, while the Vibram sole provides grip on rugged terrain. Features: - Synthetic Nubuck & Mesh upper - Partial rand - Waterproof/breathable - GORE-TEX(R) Surround(R) Technology - P-Flex Lite Spacer insole - EVA midsole - Vibram(R) Salix / XS Trek sole - Weight: 424g; 15oz (1/2 pair size 42)