Columbia Women's Bugalicious Boot 100% Waterproof Nubuck and Faux Fur Thinsulate lined, temperature rated to -25 degrees Fahrenheit Seam-sealed water resistant construction ThermaShield Frost Plug reflects heat back towards the foot Two-color, dual-density, injection molded rubber Flex-Shell with snowshoe binding lip Non-marking Omni-Grip rubber compound outsole with multi-directional tread pattern