Scuba Diving Mask Calibro Cressi The Calibro is the next-generation diving mask equipped with IDF-Integrated Dual Frame technology, offering an exceptional field of view. The mask is designed so that the integrated face and frame allow for an extremely hydrodynamic and compact shape with a particularly wide lens, maintaining the mask extremely close to the face. Calibro combines minimal internal volume with a phenomenal field of view due to the raked angle of the frame. The buckles are, as always, directly integrated into the rigid skirt through a solid but flexible rubber attachment that allows you to adjust and place the mouthpiece without shifting the mask. Thanks to its matte coating, all the mask's components match, enhancing the underwater experience by preventing reflections in the water that may disturb marine life. Calibro is the perfect mask for freediving since it is designed to provide the diver with a feeling of total freedom and comfort. The mask features inverted teardrop lenses slightly inclined, made of tempered glass. Fog Stop system - New patent pending. A patented membrane surrounds the inner nose pocket, acting as a barrier and trapping 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 fogging, but it also reduces the need to compensate for pressure. To further improve the anti-fog effect, Cressi suggests that, the first time the dive mask is used, you can spray some anti-fog solution or apply some saliva on the inside of the lenses and then rinse them with water.