A versatile leather mountaineering and backpacking boot perfect for light duty mountaineering, heavy hiking and backpacking or various types of outdoor work situations where you need durable support and all-day comfort. This boot begs for abuse again and again. We used a new tapered 8mm high density Nylon that provides a smooth flex and protection throughout the boot, which allows for new-matic crampon compatibility and long lasting consistent flex. FeaturesIdeal terrain: General mountaineering and heavy backpackingThe 2.8mm Idro-Perwanger leather upper is ideal for water repellency, breathability and durabilityAn SBR Aircushion sole provides cushion and helps insulate from cold or hot climatesAggressive Vibram soleMulti-directional 3D Flex hinge promotes easy flex and a faster break-in periodCompatible with various non-automatic and semi-automatic crampons. Crampon compatibility is NOT ensured, and boot-crampon compatibility needs to be inspected