Assuming one isn’t on fire, nothing beats heated clothing. And while heated jacket systems for motorcycles (like those from Gerbing) have been around for a while, they don’t do you much good in a blizzard, unless you want to try to pop wheelies in a 6-foot whiteout (although they should hook up to snowmobiles just fine. Hrm). As a more mobile alternative, Online German retailer Softline offers the Magic Warm system, a 10- and 12-volt system of heated gloves and shoe insoles that are powered from a rechargeable battery. Enough juice to keep you toasty, but not enough to kill you when you fall through the ice after melting it with your steaming boots.
MAGIC WARM COMPLETE PORTABLE HEATED SYSTEMS [Softline-OnlineDE]