The MaxxDrySD™ is a safe, simple, overnight way to dry footwear. Using thermal convection – naturally rising warm air – the MaxxDrySD™ removes dampness, perspiration and odor from all types of shoes or boots. Warm air gradually rises to dry rain soaked shoes or hard-to-dry boots harmlessly overnight! Using just minimal watts, the MaxxDrySD™ is a cost- effective economically friendly tool for daily use to dry or warm footwear. Because the MaxxDrySD™ slowly dries, there s no fear of shrinkage or stiffness and no need to remove boots or shoes promptly. You can even safely store boots or shoes right on the unit until ready to use again. The MaxxDrySD™ “Simple Dry is totally uncomplicated – just plug it in! The MaxxDrySD™ carries a 30 year warranty against defective materials or workmanship.