Nike has this new Hatphones for sell today in their online-store. It is designed for those cold weather runners to keep their heads warm meanwhile enjoying mucic from iPod Nano. A mesh at the back of the cap allows you to control the iPod Nano clickwheel through the cap without removing it. The chill part is this Hatphone has integrated earphones on it.
"This cozy, comfortable skullcap features fully functional iPod Nano click wheel controls through power mesh window in back so you can keep moving while mixing up your music."