These Kid-Sized, 5.9" x 3.9" two-layer face masks feature one side that is 100% polyester that have Mathlete and the Mathnasium logo on a black background. This mask has a slit that accepts a removable filter for a third layer of protection. It comes with one filter. This face mask includes two ear piece slides to adjust to a smaller size. These masks are machine washable on cold. Hang dry or tumble on low heat. DISCLAIMER: Face masks are for general use while out in public and are not intended for a medical setting. We cannot guarantee that the mask prevents infection or the transmission of viruses.