I’ve had good luck with these for running and mountain biking:
https://www.amazon.com/Bluetooth-Alpatronix-HX200-Noise-Isolation-Smartphones/dp/B00WAA5ZBC/ref=sr_1_2?s=wireless&ie=UTF8&qid=1482422555&sr=1-2&keywords=Alpatronix+wireless+earphones
Should note: Mine are black which seem to be soldout right now.