Sea Drops is a liquid Anti-Fog and Lens Cleaner for Dive Masks, Goggles and Optical lenses. NEW IMPROVED FORMULA! The concentrated clear liquid prevents fogging even in extremely cold water. It's non-abrasive and safe for all glass and plastic lenses - will not harm surrounding silicone or rubber support frames. Designed for maximum dive mask defogging and quick, easy, in-field application. One two-drop application lasts all day, through multiple dives.