Bone conduction delivers music through the temporal bone in front of the ear, vibrations through your cheekbones to your inner ears. Listen to music without blocking your ears,also can listen to surrounding sounds, giving an awareness of what is going on around you,hear traffic coming or ringing bell when running,cycling or driving. Headband is lightweight and flexible, comfortably fit all shapes and sizes, sit comfortably on the temporal bone, durability and portability.