Plantronics BackBeat Fit
After testing dozens of bluetooth headsets for working out, the Plantronics BackBeat Fit are my absolute favorite. The sound quality is perfect for an open ear design and never fails to deliver the boost I need to get moving.
The open ear design makes it possible to wear while running or biking outdoors. You can hear the music, but you will also hear traffic and the environment so that you remain aware of what's happening around you. The strap is reflective, so you are more visible on the road.
Battery life is right around eight hours, which is at the high-end for earbuds like this and will last all day or almost a week's worth of workouts. The headphones are sweatproof.
$75 at Amazon in Blue, Red, Green and more