I like the Bose open ear buds, which is similar insofar as you can still hear everything around you, but it’s not bone conduction. They basically cling to your ear and are just a small driver near your ear canal.

I like the sound and fit better than any bone conduction headphones I’ve tried, but I don’t use these styles for swimming, which is the main advantage of bone conduction. For running, cycling, and just generally walking around in the world the Bose work great. For sitting and sound isolation, I use corded cans.