The hearing aid sweat band is a small "sock" worn over the hearing aid that protects it from moisture and dust The specially designed fabric both repels and absorbs moisture It is disposable, but will withstand a few launderings Sizes available are mini, small, medium, large and extra large Colors available are Bitsy Blue, Garden Green, Neon Glow Green, Neon Glow Yellow, Night Navy, Pretty Pink, Popsicle Orange, Poppin' Pink, Power Purple, Really Red & Youngster Yellow.