So you are tired of getting cold feet? Maybe you should give the Digitsole a look. It is a connected insole that you can control from your smartphone. It warms your feet, tracks your distance, and measures the amount of calories you have burned. The Digitsole is compatible with iOS and Android devices. Users can adjust the temperature of each insole on their smartphone. Once the temperature of the insole drops below the preset settings, the built-in thermostat goes to work.