Digitsole Heated Insoles for boots

Digitsole heated insoles fit men's shoe size 8.5 - 9.5 ir women's shoe size 19.5 - 12.5. Perfect for keeping your feet warm when ice fishing, sledding or working outside. Keep feet warm anywhere from 2 - 8 hours, depending on outside temperature. Bluetooth vompatible. NWT, never been worn.