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The La Sportiva Karakorum HC GTX is a traditional leather mountain boot with a modern twist. Robust and crampon compatible, yet ultra comfy and not overly heavy this boot ticks a lot of boxes! The ankle cuff provide three lace hooks to allow even greater ankle protection and stability, while the sturdy uppers are made using single piece 2,8mm hydro repellant split leather. The Gore Tex lining guarantees that the boot is waterproof and breathable, the Vibram Impact Brake System sole absorbs negative impact with the ground and performs well both on uphill and downhill paths. Relevant Article:   For more information on choosing the right mountain boots and fitting the correct crampons click here: Mountain Boots and Crampons Specification Crampon Compatibility: C1/C2 High cuff with three lacing hooks for stability and protection 3D Flex system at ankle gives superb freedom of movement Durable rand protects against abrasion Thermal footbed adds comfort and warmth TPU inserts for crampon compatibility 5mm high-density nylon lasting board with increased thickness in middle zone Single/Double: Single Lining: Gore-Tex® Performance Comfort Midsole: Expanded PU + EVA + Heel crampon compatible TPU insert Outsole: Vibram Impact Brake System Upper: 3+ mm water-repellent Idro-Perwanger leather Weight: 1888g per pair (42) Help with sizing your mountain boots If you requir