Extremely technical boot designed for high level mountaineering. Great internal climate and insulation. Highly waterproof elastic gaiter and YKK waterproof zip. Double type of GORE-TEX : GORE-TEX Insulated Comfort lining and GORE-TEX Performance Comfort gusset. Double density PU wedge for cushioning and lightweight. Inner boot with self locking+multi directional hook lacing system 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".