Cyclone Drying Systems - 1 pair Boot Dryer register vent Introducing the Cyclone Boot Dryer Register Vent - the perfect solution for drying wet shoes and boots! Easily dry work boots, kids shoes, or simply warm them up. A must-have for anyone in need of quick and efficient drying. Say goodbye to soggy footwear with Cyclone! Using the power of your home central air you simply remove your old register vent and place the Cyclone register vent into it. With a built in slide vent you can control how much air flow is directed to the boots or into the room. Features: Fit's 4"x10" register vents Flow control vent 10" extended tube for the largest of boots The perfect solution for drying wet shoes and boots Easily dry work boots, kids shoes, or simply warm them up.