Sports Accessories Dry N' Warm Footwear Dryer and Pre-warmer in Black Happy Feet Dry-n-Warm boot dryer is a footwear drying and warming system. Portable, Convenient, Affordable and Silent. Convection Heat thermally dries from the inside out without removing your liners Works on household current in North America and will work in Europe with a power converter. Comes with a 1 year manufactures warranty.