Check these out ... Wireless Sport Open Earbuds for Workouts | BoseWell - I personally have some weird anatomy making in-ear solutions sound worse than over-ear solutions. I currently use an over-ear solution when cycling but this means I can't have both - protection with a helmet and decent sound. So actually color me interested as I have a use case for this product.
Nevertheless what is really holding me back is the glasses themselves not going transparent in darker conditions. I do a lot of cycling in dusk or later. So this kills the product for me.