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 1000 is similar in design to the UltraFit 500 but with the added feature of a 3 button in-line remote control and a microphone, both of which allow you to use your iPod or iPhone. Like the UltraFit 500, the 1000 is designed to sit in the flange of your ear canal and provide a moderate noise suppression. The UltraFit 1000 also comes with a short (14") hassle-free and tangle-free cable for MP3 sleeve and collar connections.