Built for nature???s toughest conditions, the Nepal Cube GTX is a warm, lightweight women's mountaineering boot with state-of-the-art technology for climbing on mixed terrain. This boot???s high-abrasion resistant outer and Comfort Gore-Tex?? membrane work together to provide waterproof breathability without sacrificing warmth. The highly insulating Carbon Tech honeycomb insole is lightweight, stiff and low profile, while the innovative 3D Flex??? ankle and variable fit tongue deliver the custom fit you need on the mountain. . . . Upper: 3.2 mm silicone impregnated Idro-Perwanger Roughout leather with high-abrasion resistant fabric and air-injected rubber rands. . Lining: Gore-Tex?? Insulated. . Insole: Carbon Tech honeycomb insulation, 4mm EVA. . Midsole: 2mm Polyurethane graded for crampon attachment. . Sole: Re-soleable Vibram?? with Impact Brake System???. . Last: Women???s Nepal. . Ideal Use: Winter mountaineering, ice climbing, mixed climbing. . Innovative 3D Flex??? ankle and removable adjustable variable fit tongue. . Weight: 25.2 oz.. . 801216210586 29398700050 11X