It combines a great technicality due to its origin as a freediving mask with an attractive design and medium proportions. NEW PATENT PENDING. A patented membrane surrounding the inner nose pocket which acts as a barrier and traps any moisture escaping from the diver’s nose involuntarily when breathing through the mouth. The result is that not only is the moisture channeled away from the lenses, thus avoiding the fogging up of them, but it also reduces the need to compensate for pressure.
