My husband is an audiophile which pretty much makes me an audiophile. After much research, I chose these: JBL Reflect Contour Bluetooth Wireless Sports Headphones (Blue) https://www.amazon.com/dp/B01MAXXC8K/ref=cm_sw_r_cp_apip_BEUGqDPmyf3f3
I was between these and the Bose Soundsports. The two specs that made me choose the JBLs over the Bose are; the JBLs have a better frequency response for the type of music I like to listen to while working out (drum n bass, techno, house) and the JBLs have a closed back design as opposed to the Bose open back design which allows ambient noise in. Which is good if you plan to wear them outside riding a bike or running near busy streets. I strictly use mine in the gym and wanted that sweet, sweet noise cancelling.
After a couple weeks with them, I'm in love. They are lightweight, sound bloody fantastic, hold a charge well, fit in my ear perfectly (my other ones would pop out constantly when running) and block unwanted gym noise.