The ergonomic wing enhancer on the JBL Endurance Race 2 earbuds uses Twistlock technology. That means a better seal and with more stability in your ears when you're using them, not to mention all-day comfort.

JBL Endurance Race 2 earbuds use Active Noise Cancelling to listen to your surroundings and filter out distracting noise. Smart Ambient lets you control how much of the outside world you want to hear, so you can talk with others or stay aware of your surroundings—all without taking your earbuds out.