Here's an interesting earphone - similar to the Airpods insofar as the earpieces do not go into the ear canals, but different in having a much more secure fit, yet the sound is a mixture - deep bass no better than Airpods, but from the upper bass to the top end much more like a typical IEM.
http://www.hifiheadphones.co.uk/community/threads/marshall-minor-ii-bluetooth-earphone-review.4549/