Polk Audio UltraFit 3000 Sports Headphones with Microphone, Pink/Grey. UltraFit 3000 is the most extreme high performance sports headphone system ever. SecureFit Support design wraps the bud around your ears, for the most stability even during rough play, while Moisture shield technology wicks away sweat. Pick the custom eartip that fits the best, for a snug (yet comfortable) deep ear-canal audio experience. On-the-fly controllers, two custom cable lengths, as well as superior material durability, make the UltraFit 3000 the last sports headphone you'll ever need. Ultra-high performance digital sound, focused details, full fidelity and deep bass Convenient 3-button in-line controls microphone, for on-the-fly audio and phone control without breaking your concentration SecureFit support keeps your headphones comfortably in place even during the roughest workout Ultra-flexible tangle-free planar audio cable eliminates cable tangle. Two easily-switchable custom lengths included, including a 14-inch length specifically for iPod nano, iPod Shuffle and other MP3 sleeve and collar connections. StrainGuard Kevlar core technology and computer-designed transitional connections eliminate cable failure Moisture shield technology deflects and resists moisture, for peak performance through the most strenuous activity 3.5mm connector is designed to fit through the opening on all i-gadget cases Engineered for durability, performance comfort, and made with the most advanced materials and headphone micro-technology, to be the last pair of sports headphones you'll ever need