THERM-IC C-Pack 1300 B + Heat Kit Heated Insoles Set

"Enjoy winter exercise to the full with the Therm-ic Insoles Set. Each Therm-ic Insoles Set includes a pair of heated insoles and 1 pair of C-pack batteries. Specifications: -Fitted with ultra-fine heating elements, the insoles diffuse constant heat for immediate well-being and an optimal foot temperature. -The C-pack 1300 batteries provide up to 13 hrs of heat. -Some are also fitted with the Bluetooth© function, enabling you to remote-manage your heating via smartphone : Thermic Heat Control App"