Face Mask Kits are made from silicone, works with glasses and goggles, and includes custom sizing clip. Five Filters are included. You can clean them, as per instructions, in the dishwasher, microwave, hand washing, and oven. Ten Face Mask Filter Refills are also available. There are 3 sizes available: Kid (small), Teen & Adult (Medium & Large). The Kids Mask Glows in the Dark!