How would you like to get your hands on a rechargeable insole that can be used to heat your feet and track your steps? You can link up to Digitsole via Bluetooth and use an Android or iOS app to adjust the temperature of your feet (separately if necessary). The insoles will also track your steps and tell you how many calories you’ve burned. This first caught our eye last year when there was a successful Kickstarter campaign that brought in more than double the $40k of funding it requested. Clearly a lot of people think it’s a genius idea, but at $200 a pair we’re not so sure.