I decided to modify one of my old hoodies with some 5 volt USB heating pads to see just how well they worked.

I stitched the panels to the inside of the hoodie, and used doubled over cotton webbing to cover and protect the wire… and stop it stretching too.

There were two pads either side at the front pockets and one larger, central pad over the lower back.

The USB power outlet came out into the pocket where you can connect it to a standard USB power bank.

There really isn’t much more to say, they work a treat, and when under a coat it really heats you up in no time at all. With a large power bank this can keep you warm for 4 or 5 hours while outside. I have since invested in a cheap 3 setting heat controller that I might install next winter to stop things getting too toasty.