The PEET Original XL Tall Shoe & Boot Dryer uses silent convection technology to dry and deodorize footwear without fans or forced heat. Slightly warmed air circulates through the AirChambers and DryPorts to dry most footwear overnight while helping preserve leather, rubber, vinyl, neoprene, canvas, synthetics, fleece, microfiber, and more. It includes one pair of 12" extensions for taller boots and operates continuously using minimal electricity from a standard 110-120V household outlet. Made in USA.