The Arctic Adventure boots from Muck Boots are soft, supple, and slimming, rated to minus 30 degrees for maximum warmth on the coldest winter days. They feature a true women's last for an excellent fit that looks and feels great. These lightweight wellies offer a tall, slimming look and are equipped with warm fleece lining, 4mm CR Flex-Foam for comfort and blister resistance, and an EVA midsole for added cushioning. The CR Flex-Foam adjusts to the unique contours of your foot, creating a comfortable and stable foundation. The upper is made of Neoprene, the lining is warm fleece, and the sole is rubber. Care instructions recommend cleaning with cold water and using rubber boot care products. Heel height is 2.5 cm.