M Essentials Sea Drop Anti-Fog & Lens Cleaner for Dive Masks Long lasting scuba mask anti fog drops are non-toxic, biodegradable, and alcohol-free Quick, easy, in-field application is non-abrasive and safe for all glass and plastic dive mask lenses Formula performs well in cold water and will not harm surrounding silicone or rubber support frames Not recommended for swim goggles, but will work on eye glasses, face masks, binoculars, and telescopes Made in USA