When laced in the La Sportiva Karakorum Mountaineering Boots, we cover countless miles with the plush platform taking on the shock of our heavy load, and the tough materials brushing off the rugged terrain. Equipped with the multi-directional 3D Flex hinge, this pair protects our ankles yet still lets them flex freely, while the footbed's anti-torsion plate and the sole's earth-biting lugs ensure stable steps on unstable ground.