For everyone who didn't know such things existed and now want to buy one...
I did tens of hours of research on heated clothing a few years back and couldn't be happier with my Ororo vest. Many of their other products underwhelm (their gloves suck) but the vests/jackets are fantastic. I've gifted a few and everyone raves
Make sure you get one with the heated neck element, and if you buy an open stock clearance item (it's end-of-season sale time) check to see that it includes the battery