However, if you just want to pop on a jacket and be warm instantly (like, if you're a hockey or soccer mom who has to sit in a cold bleacher seat), an electric heated jacket is the way to go. I tried the version with four heat zones (there's another, more expensive one with five heat zones, but four is plenty). Most importantly, the jacket itself has enough insulation that you don't instantly wonder why you're wearing it, should the battery run out.