JBL Endurance Zone True Wireless Open-Ear Sport Earphones - BlackFeel the beat, Sense your surroundings. The dynamic sound, all day comfort, and rugged design of JBL Endurance Zone earbuds will inspire you to reach for your physical limits and beyond. JBL OpenSound technology fuels your workout with punchy sound from a perfect listening angle that keeps your ears free, but aware of the surroundings. And there's minimal sound leakage because the person on the next yoga mat over doesn't need to hear what you're