Dr. Dry Electric Shoe/Boot Dryer and Warmer Use Safe PTC heater, making it safe and reliable. Will not damage footwear, or burn anything. Nor it will it cost you lot of electricity to run. Dries a wet shoe in about then 3-4 hours, (for a soaking wet shoe it can take up to 12 hours). Dries, Dehumidifies, and Deodorizes. Great for outdoor activities, like camping, hiking, hunting, skiing and more. Works for virtually any product and material, e.g. Shoes, Boots, Gloves, Liners, Ski masks etc. Preset heat setting, so you do not have to tinker around for the right temperature.