Koss Fit Clips 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 Fit Clips offer an in-line one touch microphone. Listeners are given the choice of three sizes of ear cushions to fit perfectly in any ear. Soft flexible clips rest comfortably around the ear to ensure that the music never stops. Fit Clips are available in four vibrant colors featuring a sweat-resistant coating for active use and unmatched durability..