Results matter, and when you have the perfect headphones there s nothing standing in-between you and your workout. With their FlipHookTM design, they adapt to an in-ear or behind-the-ear fit for added convenience. A combination of comfortable and soft ear tips and TwistLock technology means these buds are fitting securely in your ears and guaranteed never to hurt or fall out. And if you thought few drops were going to ruin your Endurance Run 3, think again