Top features:- Extra Bass adds deep, powerful low end at the press of a button- Sweat-resistant and washable design keeps up with your workout- Headphones stay firmly in place with arc support fins- Hands-free calls and music with in-line mic and controlsExtra BassFeel every beat and bassline with Extra Bass, spurring you on while you’re in the gym or out running. Sony Extra Bass MDR-XB510ASR Headphones help you focus on the rhythm as you push yourself to succeed.Sweat-resistant and washable designKeep your headphones clean when you’re done exercising. Sony MDR XB510ASR Headphones are washable, so you can rinse them under a tap. Wear them outdoors with confidence – running in the rain won’t damage them.Headphones stay firmly in placeYou don’t want to be distracted with loose headphones while you’re training. That’s why the Sony XB510 In-ear Headphones feature arc supports to stay firmly in place. They’ll stay put even when you’re moving fast or stretching.Hands-free calls and musicTake calls, adjust volume levels or switch tracks while you’re working out. There’s a built-in mic for hand-free calls and controlling your smart device.