UGG Men's Butte Waterproof Winter Boots. Upper: New patent/leather upper with an urban flare. Insole: Sheepskin sock naturally wicks away moisture and helps keep your feet dry and cozy. Outsole: Vibram outsoles for superior traction and eVent membrane for both waterproof/breathable technology. Exclusive Vibram outsole designed specifically for UGG Australia utilizing the TC1 wet/snow compound. Repeating lug pattern maximizes surface contact and provides flexibility at the foot's natural flex points. Style Details: The men's Butte - the standard for winter. Designed to handle the harshest winter elements. 7" shaft height (based on Men’s size 9). 1.25" heel height.