Koss FitClips utilize an original and unique design that ensures the perfect fit. Using a new in-ear ported design, the elements rest comfortably in the ear to create the ideal seal for the ultimate listening experience. The Koss FitClips feature an in line, one touch microphone. Listeners are given the choice of three sizes of ear cushions designed to fit perfectly in every ear. Soft flexible clips rest comfortably around the ear to guarantee the music never stops. FitClips are available in four vibrant colors featuring a sweat-resistant coating for active use and unmatched durability.