JBL has released Endurance Sprint, its latest waterproof Bluetooth sports headphones. Want to enjoy your favorite music during any intense workout? The Endurance Sprint is a pair of wireless sport earbuds that weighs 1 pound. Workout Headphones, Sports Headphones, Over Ear Headphones, Macbook Pro Keyboard, Bluetooth Gadgets, Waterproof Headphones, Intense Workout, Listening To Music, Training