Surprise, the reason your ski jacket doesn’t have a heater in it is because nobody likes lugging around the car battery required to keep it running. But Aevex has harnessed the stored energy of lithium-polymer batteries, form shaped them to fit snugly inside a glove to deliver 4-6 hours of finger baking. Best of all, the way the textile works, it actually allocates heat only where it’s needed in your hand.