The heating soles are powered by a 3.7V efficient heating system, which makes it possible to build the battery into the soles. The heating element is located under the front of the foot, near the toes. This ensures a comfortable and flexible heating system that you don’t notice until you switch on the heating.
The soles are put through several tests, including 1000000x bend test, drop test, and of course safety and performance tests, to ensure the product is both safe and durable. Charging takes place via USB, which ensures easy access to charging, even when you’re on the move.