Foot heater: Get a pair of electric heater foot insoles. Four options: Choose from one, two, three or four pairs. Two options: Comes in women or men shoe size. Micro heater: With built-in micro heater chip to heat shoes quickly and evenly. USB connection: USB cable connects the laptop or computer to simultaneously heat insoles. Winter accessories: Great accessory for the colder winter months. Electric Heater Foot Insoles | Living Social