You may find hooded jackets annoying to wear while working out, but consider a sports jacket with an optional hood if you run outside in cold weather. Several styles of sports jackets, such as Gore-Tex's XCR jackets, have detachable hoods that you can keep zipped into a pocket if you think you might need it. Or, keep it at home with your gear on days when you know you won't need it. The advantages of a hood: A hood covers the entire back of your neck, and you will be surprised at how much warmer you feel on a day when the wind chill is 20 degrees below zero but you want to run outside anyway. For extra warmth: Pull the hood up over a hat, ear-band, or balaclava.