Designed with an open frame and custom fitted aluminum heat sink, the Travel Dry Portable Boot & Shoe Dryer combines the simplicity of convection drying with the convenience of portability. Using minimal watts it generates a mild uniform heat that is just hot enough to remove moisture from sweat without causing damage to your footwear. Its compact portable design conveniently fits inside most types of footwear, allowing for easy travel. Design Portable boot and shoe dryer fits in most types of footwear Convection heat uses minimum watts to gradually remove moisture without causing damage to footwear Ideal for travel; compact design packs easily in shoes or carry-on luggage Helps eliminate odors and reduce the growth of bacteria, fungus, and mold Will not damage footwear, liner, or foot bed