One alpinist, one boot? The ICE MASTER is ready when you are and will tackle rapid winter ascents, high summer mountain traverses and the wide array of new school of mixed-ice and dry-tooling routes. Whether you are moving at full speed in the mountains or crag climbing with your "points" overhead - light weight is important. ICE MASTERS are near minimum mass employing a high tenacity Teramida fabric body with 2mm full grain leather cuff, lacing overlays and heel counter. This combo is backed up with triple layer Thinsulate for warmth and Boreal Dry-Line for complete weather protection and waterproofness. The ICE MASTER also features generous padding throughout and Boreal's Ankle Lacing System and removable Velcro Strap - to suck the rear of the boot in and lock your heels down for extra climbing power. Sole is ultralight TPS-3 with triple density rubber for traction & support and is hard bale crampon compatible. Midsole is 10mm EVA-PRO for shock absorbtion and extra thermal insulation. Sold in UK sizes - example, if you wear a US 10.5 (UK9.5) hiking boot order a UK10 (US 11) for an equal fit.