The Muck Boots Ladies Otter Dark Navy Arctic Apres Lace Mid Boot is the ideal blend of functional and fashionable: Waterproof design, warm fleece lining, slip-resistant sole, and a sleek leather look make these boots perfect for shoveling the drive or relaxing in the ski lodge. Features include a premium waterproof leather upper, 5mm CR Flex-Foam insulation, a rugged outsole for traction, a warm fleece lining, a stylish and cozy faux fur trim, as well as an EVA Midsole and a women's specific fit. Comfort Range: -20 degrees F to 50 degrees F.