**REMOVABLE INSOLE** Crafted to handle the harshest winter elements, the men's Butte pairs understated style with stay-dry technology. Cuffable, waterproof full-grain leather and ballistic nylon are finished with an exclusive Vibram® outsole with repeating-lug pattern. An eVent® membrane and moisture-wicking sheepskin lining offer the warmth and dry comfort characteristic of classic UGG®.