The Muck Boots Ladies Black Quilt Arctic Weekend Mid-Height Boots are perfect for extreme cold weather. The fleece lining keeps toes warm and dry during any outdoor activity. Lightweight EVA midsole and non-slip upper outsole are a perfect combination. The Arctic Weekend looks great while making you comfy on snowy days. Comfort range of -20 degrees F/-30 degrees C to 50 degrees F/10 degrees C. Features include a warm fleece lining, Achilles reinforcement, an EVA contoured molded midsole, 4mm CR flex-foam insulation, along with a light gripping rubber outsole.