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When miles of harsh conditions stand between us and the peak we desire, we kit up with Mammut's Nordwand 6000 High Mountaineering Boot. Vibram's low-profile Litebase tech and the rigid carbon insole save grams without sacrificing performance for an ultralight double boot that's as hungry for the summit as we are. When things get technical, the full crampon compatible design lets us approach mixed routes with the security of automatic crampons. From waist deep powder to crumbling ice, the toasty liner and double-insulted footbed hold in heat and the robust waterproof gaiter blocks out the wet, keeping our feet comfortably dry through it all.