Polk Audio"s new UltraFit Sports Headphone Series is a rethinking from the ground up of performance, comfort and durability - the three characteristics serious athletes need most in a pair of headphones. Serious music lovers too will value the UltraFit Series because of its undeniably impressive sonic performance. The UltraFit 500 is our entry model and is designed to sit in the flange of your ear canal, while the ear piece hook insures a snug yet comfortable fit. The UltraFit 500 does not use in-line controls or a microphone, but has been designed to assure you of moderate noise suppression, so you"re always aware of your environment. A short (14") cable, frees you to wear an MP3 player on a sleeve or collar for the utmost in hassle-free and tangle-free connections.