This is exactly what My wife wanted, although she didn't know it until she got it as a gift. The jacket is great at doing exactly what a light jacket is supposed to do, Be comfortable, lightweight, compact, and comfortable. It also performs excellently as a heavy jacket, but without the bulk. It actually works when the temperature is very cold, but when it warms up a little, just turn off the heat and you are again comfortable. We can't say enough.