This is the Tropical SeasA(R) Mask Defogger Gel 2oz Features: Mask Defogger pH balanced for the eyes Alcohol and Silicone Free! This is the defogger you have been searching for! Helps keep your mask clean and clear. Removes impurities, while helping extend the life of your mask. pH balanced - does not irritate eyes. Alcohol and Silicone Free! Will not harm or scratch plastic lenses. Also, works great on swimming and ski goggles.