Bone conduction headphones — headphones that vibrate music right into your skull, allowing you to hear it no matter how loud your surroundings are — haven't quite caught on. It might be because people just don't know about it, or it might be because they all look so damned awkward.
If these MyCo eyeSonics fail, my guess is that it's because of the latter reason. These goofy looking glasses have bone-conduction headphones built into them, although wearing them will make you look like a nearsighted deaf kid. You can detach the headphones, but I still don't think I'd want to be seen wearing them. And for a whopping $330 for the whole getup, they basically sealed the deal of my non-purchase.