SOL Republic 1132-31 Relays 1-Button In-Ear Headphones - Black Everyday Active - Sport. Work. Play. Relays Crossover Headphones Whether you"re running for a train or training for a run, enjoy incredible sound with nothing holding you back. Relays are the first headphones that keep up with you, no matter where your day takes you. Designed with patent-pending FreeFlex Technology, Relays are easy to put in and won"t fall out, making them ideal for the urban, active lifestyle. Key Features FreeFlex Technology - Your Headphones Will Not Fall OutFull Powered Sound - Bringing Out The Best In All Types Of MusicLightweight, Low Profile Design - Fits Under A Helmet Or Hat & Won"t Stick OutSweat & Water Resistant - Won"t Be Damaged When Working Up A SweatFree Ear Tips For Life - Never Again Worry About Losing An Ear Tip Easy to put in. Won"t fall out. Easy To Put In. Won"t Fall Out. And Fully Loaded With Sonic Power Relays are the world"s first In-Ear Headphones with FreeFlex Technology, the secure-fit system that requires no complicated parts. It"s a universally adaptable fit that"s easy to put in and won"t fall out. Better sound can improve every activity in your day. For sports, train harder. For work, stay focused. For play, play longer. Relays micro i5 Sound Engines deliver a full powered sound with vibrant highs and strong bass for emotional energy. The first headphone that keeps up with you. Innovative Design. Great Sound, No Sweat Relays keep you looking good with a simple, low profile design and no protruding parts. They fit under a hat or helmet and are easy to transport - making them comfortable and low maintenance. It"s not difficult to make In-Ear Headphones sweat and water resistant, but it"s hard to make them without killing sound quality. SOL REPUBLIC Engineers accomplished both, so you can work out your hardest while enjoying incredible sound.