Buy an electrically heated vest or jacket liner from Gerbing, Widder or one of the other vendors. I also recommend electrically heated Winter gloves. These items are a bit pricey, but they last for years and are convenient to use. I wouldn't be without them.Hoosier Scooter said:
A windscreen can help deflect some wind chill - but it won't keep you warm. Electrically heated clothing will cold make temps an non-issue. The only thing that stops me is the arrival of that snow, ice, salt, stuff.