Robust boots for everyday winter wear, sliding down hills, and bombing around in deep snow and slush. The Ice Castle is designed specifically for a child's foot and features a removable warm felt liner.Uppers are waterproof rubber, sealed for protection from snow and ice. Top collar with a lace helps keep out powder. Removable felt liner can be washed and dried separately. Midsole and lower shell are made of flexible, lightweight thermoplastic rubber. Outsoles are lugged, TPR rubber for good traction on snow and ice. Active temperature rating is -30°C.