The Quantum is already considered one of the best diving masks on the global market. The revolutionary innovation lies in its ability to not only provide an even better downward view but also to significantly reduce or prevent fogging through thermal regulation and membranes. Air from the nose is directed towards the silicone body rather than towards the nose through a system of membranes placed around the eyes and nose. The outer part of the silicone body is additionally equipped with two small heat exchangers, which cause the temperature inside the mask (after about 10 minutes) to approach the outside temperature. Of course, the Quantum also features Cressi's legendary good fit, suitable for almost all face shapes and sizes. Optional corrective lenses for +dpt. and -dpt. complete the offering. The lenses are not chemically treated. As with all new masks, it is recommended to use a mask base cleaner for the Quantum.