Add some toasty warmth to your ski boots with help from the Therm-ic ThermicSole TrimFit kit, without having to say goodbye to your favorite footbeds. The TrimFit can be attached to your pre-made orthotics. The kit comes with a pair of heating elements that you place beneath the toes, with wiring designed to go under your insoles for smooth comfort. A pair of thin, self-adhesive Cambrelle fabric covers are included to help keep the heating system in place. Plug them into a Therm-ic C-pack battery (sold separately), and enjoy warm toes in the deep snow.