The Muck Boots Ladies Black Quilt Arctic Adventure Boots feature an extremely warm and stylish boot design in a neoprene/rubber material combination. This comfortable winter boot comes in a variety of bright colors and prints. The lightweight EVA midsole grips well but sheds debris to avoid tracking dirt inside the home or office. There are several carryover colors and some fresh new colors and prints. Comfort Range: -20 degrees F/-30 degrees C to 50 degrees F/10 degrees C. Features include a comfortable neoprene upper with a tall slimming look, as well as a warm fleece lining, 4mm CR flex-foam insulation and an EVA midsole for added comfort.