The Hy'n Dry boot & shoe dryer is ideal for drying boots and shoes of all kinds; safely, silently and thoroughly. Natural Thermal Convection - Ceramic Heating Unit produces Natural Thermal Convection Heat that naturally rises and circulates to dry boots & shoes quickly. Drip Tray - Convenient Drip Tray collects dirty water dripping, keeping the floor clean. Sturdy, Large, One-Piece Base - Nearly 30% larger than the other leading brand. One-piece bas accommodates any boots or shoes without tipping or disassembling while in use. Safe, Silent, Tough - Safe to use overnight?no moving parts. Constructed of tough, rustproof, easy-to-clean, fire-resistant, high temperature ABS thermoplastic.