This is the Aquaseal Sea Drops Anti-Fog Scuba Lens Mask Cleaner by McNett for Diving, Swimming, etc Safe for all glass and plastic lenses-will not harm surrounding silicone or rubber support frames. Sea Drops are designed for maximum dive mask defogging and quick, easy, in-field application. Also excellent for ski goggles, eye glasses, face masks, binoculars and telescopes. Not recommended for swim goggles. It features: Proven, long lasting liquid formula Concentrated, two-drop application Non-abrasive-safe for all lenses and optics Performs well in extremely cold water Non-toxic, biodegradable and alcohol-free Don&';t get lost in the fog! Always keep a bottle handy in your dive bag.