See Clear® Eye Glass Cleaning Wipes, 1 Case of 1440 Gowns Stay Warm and Comfortable when Jobst Relief 20 30 Knee Hi Stay Warm and Comfortable when Driving on Cold Days * Heats the back and seat * Instant heat * Multiple settings push button hand control with 3 settings (High Low Heat On Of) * Pressure activated shuts off automatically when not in use * Designed for the car 12 Volt adaptor plugs into your car lighter socket * Durability and Comfort woven fabric and high density foam for comfort and durability * Thin design thin profile design fits all vehicles * what can you hear underwater anyway so you don't have to worry about scratching Make sure you can see without smudges or other obstructions blocking your vision when you use these PDI® See Clear® Eye Glass Cleaning Wipes to clean your glass or polycarbonate eye glass lenses