Upper Material: silicone, Idro-Perwanger roughout leather, high-abrasion fabric, Vibram rubber rand Waterproofing: GORE-TEX Insulated Comfort membrane Insulation: none Lining: Gore-Tex Insulated Comfort Footwear Closure: lace The Nepal Evo GTX is the trusted, classic mountaineering boot that merges traditional construction with modern materials and an updated aesthetic. They provide a classic fit and proven performance for mountaineers needing a warm and technical boot. With a comfortable Gore-Tex membrane, innovative 3D ankle flex and a removable and adjustable tongue, they can be fine-tuned to effectively tackle all mountaineering, mixed and ice climbing missions.