The expedition boot for six thousand meter mountains. Perfect internal microclimate and insulation. Ultra-resistant shell made of Superfabric and Microfiber, compact design and technical lacing system and back side flex notch to help feet's rolling. Removable inner bootee with Velcro fastening. Double density PU wedge for cushioning and lightweight and new Vibram Penia outsole with deep lugs for great grip. Automatic crampons compatible. Rubber Rand System to better protect from scratches and scuffs. Increased lightness because of the new Zamberlan Carbon Fiber "Mid-Soul".