This is a little treasure. I haven't had an external ear set before but wanted them for running. This headphone delivers in spades. Directions in the package are minimal - not even a pic to show on-ear, but once in place this piece sits quietly, comfortably and without budging on my smallish ears. The lower section is ergonomically weighted and shaped so the speaker rests in place without pressure. Pairing is quick and I had zero drop offs during several hours of phone calls, podcasts, and music- both while walking through the building and traveling. What really makes this choice shine is the sound. Warm, well balanced, 'true', unexpectedly nice for such tiny equipment. Even classical pieces were decently represented, with an even spectrum across the tonal range and enough complexity of overtones to enjoy listening.Add in water resistance - the seams and material make this claim believable- as well the neat LED charge display, and I think I've found my new favorite. *Note- the recharging C port could use a plug/cap; it's pointing upwards and inviting raindrops.Be aware that this does not come with a case, and the action options are minimal: on/off, answer/hangup, pause/restart. It's so ergonomic and aurally pleasing I don't mind.