free priority delivery for amazon prime customers mixed reviews great discount.Product DescriptionYour life never stops moving, so why should your music? Music is central to everything you do, it fuels you from one moment to the next. RELAYS is the first crossover headphone with patent-pending Free Flex Technology so they won't fall out. From the streets to the trails and the train to the slopes, RELAYS are the first headphones that keep up with you. Patent-pending Free Flex Technology provides a seamless, adaptable fit that's easy to put in and stays put. Enjoy incredible sound with nothing holding you back, so you can go wherever your day takes you.