Be careful out there.
Of all the things to hear about after I just bought a heated vest and gloves…
I was born and raised in northern mn. I remember winters when it hit -40. So cold it seemed the world operated on a slightly different set of parameters. Metal became brittle. Liquid fuels became solid. Trees would explode in the night as the sap finally froze. So trust when I say forget the gimmicks, the dodgy heating schemes.
Layers is the way. Wear dress socks under regular socks under big old wollies. Wear a T-shirt under a long sleeve under a collared under a sweatshirt. You catch my drift. Anything beyond the occasional chemical mitten warmer packet thingys is suspect at best.
Vests and gloves may be safer given the lack of stepping on them. (My reasoning is motivated.)