Aerial7 660220 Black Sound Disk Sports Headband Headphone 3.5mm Workout Headset Wicking fabric draws moisture away from your head allowing it to evaporate more rapidly Engineered to deliver the highest-quality listening experience from your mp3 player or other music device Built-in microphone for use with iPhone, BlackBerry and other mobile devices The Sound Disk is only 8.5mm thick and delivers a full spectrum sound experience