To prevent fogging, we recommend that you apply a special anti-fogging product, available in the diving market, before using the mask for the first time.
Mask fogging is a normal occurrence, even after the film of silicone has been removed. Normal fogging can be easily prevented with after market anti-fog agents or saliva. Rub onto the lens and then rinse. Your dive will now be fog free!
Some after after-market anti-fog agents contain formaldehyde, alcohol, or other substances that may damage the plastic materials used in your mask. If unsure, avoid prolonged exposure of the anti-fog agent with the plastic parts of your mask.