Fold and Staple coin holders are by far the most economical way to package you're U.S. and foreign coins for storage, filing, displaying or transporting. Made from white-surfaced cardboard with a window of remarkably strong yet clear Mylar that allows you to see both sides of the coin. Not only are these holders chemically the most non-reactive they are also optically perfect. Quick & easy to use - simply insert a coin, fold holder over and staple. Then you can write the date, description, and condition of the coin on the plain white border of the holder. Simple as that!