The Hejduk MasterGuard Full Shield is a facemask that is surface treated with a special technology, it is coated with anti-fog and anti-scratch micro-layers as a fogging and scratch protection. These are hard coatings with a thickness of 5 microns .005mm for a permanent coated mask. The Application cannot be used with water to clean. Simply pat dry and use a clean dry cloth to wipe away and moisture or grime.