USB Powered Heated jackets have 3 temperature settings and heating panels on both the front and back. The Escape USB Heated Jacket runs off a 5V 2Amp power bank which can be bought separately or you can use your existing one. These jackets last anywhere from 4 hours on high to 10+ hours on low and you can also charge your phone off it when your not using the heater. It has a fleece lining and poly insulation fill.
The heating panels are soft micro-alloy fiber that feels no different to your regular clothing materials which allow flexibility and an even distribution of heat.