Insol

inSol utilizes the power of piezoelectricity, heating your shoes as you walk to keep your feet warm and comfortable even in the coldest conditions.

inSol, the newest product from Lioness, is a piezoelectrically-powered insole that heats your feet with every step. Whether you're a winter athlete or simply a winter walker, inSol will change the way you think about cold feet. Piezoelectric crystals in our waterproof and comfortable insole generate an electric charge when compressed, allowing the heaters to be powered by the waste energy produced  ...