In the world of amazing comfort and lasting warmth, Thermic’s C-Pack 1300 B Battery represents a perfect balance of both attributes. Suitable for use with Thermic Insoles and Heat Kits, this advanced accessory fits seamlessly with a wide range of Thermic products and offers up to 13 hours of lasting heat. Its highly convenient Bluetooth technology allows for the immediate control of heat output right from your smartphone, elevating both customizability and warmth with the touch of a screen. Complete with a USB charger for maximized battery life, the Thermic C-Pack 1300 B Battery is well-prepared for even the most adventurous days on snow.