The Plantronics BackBeat Fit is an excellent, gym-friendly Bluetooth headphone pair that comes with a handy armband that can hold your phone while you run. It lacks a bit of low-end, but it doesn't distort, and lets just enough sound bleed through to maintain situational awareness.
Rugged, sweat-proof design; Good audio performance; Secure fit doesn't block out external sounds; Includes an armband smartphone case
Uncomfortable after prolonged use; Weak bass