The Peet Standard Boot and Shoe Dryer uses a thermal convection drying process to remove perspiration, wetness and odor from any type of shoe and boot. With these 12"H extensions, you can dry taller boots. This thermal convection drying process extends the life of expensive leather footwear by allowing leather to breathe and retain its natural oils. The Peet Standard Boot and Shoe Dryer does not blow hot air, so all footwear is dried without shrinkage or stiffness. It also prevents damage to leather footwear from heat. Designed for use with leather, vinyl, plastic, cloth/canvas and Gore-Tex®. With pac boots, you can even leave boot liners in and dry both overnight. Silent operation is ideal for everyday household use. Accommodates children's size 4 through adult size 22.