La Sportiva - Nepal EVO GTX (Yellow) - Mens: The evolution of the Nepal Extreme has taken hardcore mountaineering boots to another level. 3.2mm+ silicone impregnated Idro-Perwanger Roughout Leather upper with high-abrasion resistant fabric. Gore-Tex Duratherm lining makes the boot completely waterproof and warmer for high altitudes and extreme cold. Breathable tongue for moisture management. 3-D flex ankle system hinge. Integrated anatomical elastic snow gaiter. Vibram XSV sticky rubber rands. Tapered HP3 midsole with a SBR aircushion and shock absorbing PU inserts under the heel and ball of the foot. Insulating Ibi-thermo 9mm insole. Vibram IBS outsole is designed exclusively to soften impact on hard ground and improve traction. Board lasted construction.