This lens cloths pocket square is made from a special polyester material that is the ultimate in lens cleaning. It is recommended for any sort of glasses, camera lenses, watches, jewelry, etc. It is machine washable and the material will not scratch or degrade over time. The designs of this custom lens cloth was made by The Armoury, and depicts the dial of the tall case clock in the Horological Society of New York’s Jost Bürgi Research Library.