Therm-ic Battery Boot Heaters with Anatomically Shaped Insoles
This system is easy to install but unlike the flat insoles, the shaped insoles have arch support and a heel cup for extra support for comfort. The heating element is also pre-installed in the toe area. They are available in different lrnghts for the most comfort.
So what's the difference in batteries?
All Therm-ic batteries produce the same amount of heat. The difference is how long the heat will last. The more expensive the battery, the longer the battery will last. Also, some have added features like a remote control or Bluetooth.