The Hotronic FootWarmer S4 Custom Ski Boot Heater can be used to keep your foot warm in any shoe. Once you have charged the battery pack, just fasten the heating element onto your insoles (we recommend Hotronic Heat Ready Insoles), hook up the battery packs and set your desired temperature. The S4 battery packs offer 3 base levels of warmth for maintaining a constant temperature, and an extra heat boost setting for when you need it most. This boot heater kit includes a Power Plus recharger for your battery packs that is compatible with plugs in European CE, Canadian ETL, and standard North American outlets. Keep your feet warm for up 21.5 hours with Hotronic. This kit allows you to customize your boot heater to any insole or orthotic.
Ski boot heaters keep your feet warm in cold weather