A great defog at a great value

As a dive master, it is imperative that I have unimpeded vision, and life is much simpler if the divers I'm leading can see as well. PSI 500 is an essential tool in my...Read complete review

As a dive master, it is imperative that I have unimpeded vision, and life is much simpler if the divers I'm leading can see as well. PSI 500 is an essential tool in my diving arsenal which allows me to accomplish this aim. Whether a person is extremely nervous (and so sweating profusely underwater), or the mask lense has not been properly cleaned, PSI 500 keeps masks fog free for the entire dive. While it almost always lasts the entire day, I apply after each dive for extra insurance.

The gimick with PSI 500 is that it does not appear to be a large quantity of defog for the price. Do not be fooled! It requires far less PSI 500 to defog a mask than other defogs. (e.g. apply as little as you can to be able to smear the entire lense, and this is sufficient) As such, one small container of PSI 500 lasts hundreds of dives. (Between my 4 bottles rolling around, I couldn't say exactly how many hundreds)

In summary, myself, and the dive shop I work with have found this to be the best defog on the market. Others do work well, but not as well.