Meet the Humbgo XG Jacket: a power heated jacket that gets you the warmth you need in a flash. It may be thinner than a regular winter coat but still keeps you comfortable on cold winter days. These coats use graphene heating film. They can also withstand wind, water, and stain.
The jacket has 3 heat settings and runs for 8 hours. You will feel the heat in 5 seconds or so. You can use it with any USB power bank with a 5V output.