The Evolution of the Nepal Extreme has taken hardcore mountaineering boots to another level. The addition of Gore-Tex® Duratherm lining makes the boot completely waterproof and warmer for high altitudes and extreme cold along with a new breathable tongue for moisture management. With the addition of the patented 3-D flex ankle system hinge, an intergrated anatomical elastic snow gaiter and the 3.2mm+ silicone impregnated Idro-Perwanger Roughout Leather with sticky rubber rands the Nepal EVO will climb better than ever. The sole has a new tapered HP3 midsole with shock absorbing PU inserts under the heel and the ball of the foot, the new IBS (Impact Brake System) designed exclusively with Vibram® to soften impact on hard ground and improve traction.