Beat Kicks are washable protective headphone covers that keep sweat and unwanted moisture, makeup or anything else you want from damaging your headphones. With their unique design, they are built to fit all popular brands, shapes and sizes of headphones. With the different colors and designers, users can change the look of their headphones, simply by slipping on a pair of "kicks". So whether you are working out in or just listening to your favorite music, why not keep your headphones safe, and also add a little style. Models they work with, REGULAR SIZE: Studio, Pro, Crusher, Hesh, 750, 650, QC's, XB, MDR! NOW AVAILABLE IN "MINI" SIZE FOR SMALLER HEADPHONES ie. Solos, Mixr, EP E35, 310, Grind, Uproar, Project Rock.