You will never have wet or cold feet again once you try and use this Therm-ic Boot Warmer, the 120V gently warms and dries your footwear or gloves within a few hours. The innovative 3D design and the large surface ensures that you will have an optimum transfer of heat throughout the entire inner boot area. This boot warmer rests directly on the inside of the boot, allowing air to circulate freely. A built in thermostat makes this device safe for the use on the inside of the boots and on the footwear material. At 65 degrees Celsius, the surface temperature does not exceed 149 degrees Fahrenheit. The LED indicator light is illuminated when the device is in operation. Pre-warming your boots or gloves on the way to the slopes can be obtained by using a 12 volt DC car version adaptor plug (sold separately). This unit weighs 8 ounces, is easy to use and packs easily. No more wet boots, or cold feet. You will determine how long you stay on the mountain, instead of having the outside temperatures bring you into the lodge like all the rest.