Aerial7 660880 Sound Disk Work Out Headphones / Headband Adjustable - Blue 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