Winter sports are a lot more enjoyable when you’re not worrying about your fingers and toes falling off. And while they won’t do much for the former, +t’s +Winter Heated Insoles can help keep the latter nice and warm for four hours at a time. Pop these lightweight insoles into into your ski or snowboard boots — or even your everyday footwear — and link them to your smartphone via Bluetooth. Their temperature output is controllable using +t’s app, and once set you won’t need your phone to turn them on since integrated accelerometers fire up the insoles at the last set setting whenever they’re worn