No pain, no gain? Not with your headphones. Relays Sports revolutionary fit with Free Flex Technology is effortless to use without complicated twisting locks and hooks that irritate your ear over time. And with its noise isolating in-ear tips, you’ll hear the full sound and emotion of your music that will help you run faster and train harder. You’ll love them more than your favorite pair of shoes. You’ll hear powerful, full sound with high energy deep bass and clear vocals that bring out the emotion in your music. Ultra slim fit design sits comfortably in the ear and won’t hurt over time. In-ear tips seal the ear, blocks out outside noise, so you can hear the full sound of your music. Patented Free Flex wheel is a universal fit that’s easy to use and won’t fall out. Keeps playing when working up a sweat. Activate Siri, control volume, pause/resume/skip music and answer/hang-up phone calls with one button.