Designed for use in the planet's coldest regions, the Baffin Impact Winter Boot is rated for the coldest days on earth. A two-buckle closure provides easy access when we're wearing gloves so we won't risk losing feeling in our fingers. A snow collar tops the 1000d Diamond-Lite insulated nylon upper and keeps our feet nice and dry. The Impact has removable liners so you can warm them up in your sleeping bag at night.