The DryGuy Boot and Shoe Dryer will ensure your footwear are always nice and dry, even on a multi-day ski trip. All you have to do is pop these dryers in your boots at night. By the time you wake up your boots will be nice and dry. Hair dryers can damage the liners of your ski boots. DryGuy Boot dryers are specially designed so they won't damage your boots. These are compact, lightweight, and easy to keep in your ski bag.