Run in a bulky heavy cap? Are you out of your skull? Try this on for size.

A sure cure for cold weather runs and bad hair days Nike's Lightweight Running Skull Cap insulates your cranium while it wicks moisture away from your skin. Reflective elements improve your visibility to passing motorists during those early morning and evening runs. If you intend on running in frosty conditions consider the extra insulation in Nike's Thermal Running Skull Cap.