The Dust Bunny magnetic wiping cloth is made of a combination of hi-tech Tyvek and nylon fibers which are chemical free, lint free, washable and reusable. With nearly 50,000 fibers per square inch the Dust Bunny generates a electrostatic charge that attracts and holds dust, dirt, and lint. It can be used on many surfaces including lenses, computer monitors, film and much more. The Dust Bunny is machine washable and dryable, and can be reused many times. Each Dust Bunny measures 17" x 17".