The Mammut Taiss Light Mid GTX Mountaineering Boot is designed to be lightweight, durable, and comfortable for your alpine expeditions. Its upper is constructed with Mammut's new Georganic 3D technology that provides you with a natural fit for comfort during long treks. This upper features schoeller soft shell materials to offer protection and comfort while a breathable Gore-Tex membrane blocks moisture to keep your feet totally dry through snow field crossings and muddy trails. The Vibram soles allow you to confidently trek across varied terrain of wet and dry surfaces while the crampon-compatible design allows you to tackle snowy traverses and glacier crossings with ease.