Kamik Men's Yukon 5 Winter Boot Dark Brown For genuine leather boots with full protection from the elements, check out Yukon 5. These winter boots feature waterproof seam-sealed construction and 3M Thinsulate insulation to keep feet warm and dry. The lightweight RubberHe bottoms offer great traction. 200g of 200B 3M Thinsulate insulation. Kamik Men's Yukon 5 Winter Boot Dark Brown