Macworld Tired of invasive earbuds or over-ear headphones that constantly fall off? Meet the Mezzo Bone Conduction Headphones. These headphones make your listening experience safe and comfortable thanks to their open-ear design. Now, you can score them for only 39.96 (reg. $69) with code MEZZO! Unlike traditional headphones that deliver sound waves directly into your ear canal, these bone conduction headphones rest outside your ears and transmit sound by bypassing the eardrums completely and delivering audio vibrations directly to the bones of the skull. That means you can wear these headphone…