This is a three layered cotton fabric mask, that is machine washable for cleaning after each use. You can also hand wash and air dry if desired. Do not bleach or put in the microwave. The fabric for the outside is something you can choose. The measurements are standard at 4.5 tall in the middle, to 8.5 long, and has two pieces of 7 inches of elastic at each side. We can also make this mask taller and longer as needed.