500 PSI's Mask Defog is the only mask defogger that has been top-rated by Scuba Diving Magazine every year since 1996. It can be applied either wet or dry, and a single application typically lasts for about 3 dives.

Top-rated by Scuba Diving Magazine Every Year Since 1996

500 PSI Mask Defog is well-known as the go-to solution to defogging all types of masks, but it was originally developed for scuba diving back in 1994. What sets it apart from other brands is that it still works great even when applied to a wet mask. One application of 500 PSI Mask Defog can last up to 3 dives.

How To Defog Your Diving Mask Easily

Using 500 PSI Mask Defog is pretty simple. All you need to do is put a few drops on the inside of your dive mask and rub evenly. Other brands may require you to apply the defog to a dry mask, but 500 PSI is formulated to work in wet or dry conditions. Make sure that your hands are clean before you apply, just in case there is any reside from sunscreen on your fingers.