The Heated Vest from FNDN Detroit is just what you need to survive those cold winter days. With 6 hours of heating power on a full charge, the FNDN Heated Vest allows you to control your core temperature with 5 different heat settings. Oh, but they weren't done there. In addition to warming your body, the FNDN Vest features a Dual Port 10,000mAh battery pack - so you can charge your phone as well. Is this one of the best inventions ever? Absolutely.