CALIBRO provides a group of technical advantages that Cressi has been incorporating in the last seasons in different models. It combines a great technicality with a captivating design and medium dimensions, both of the frame and of the skirt. Its exclusive structure integrates the frame in the skirt instead of overlapping them. This exclusive construction system, that allows great lightness (118 g), reduces to the absolutely minimum the thickness improving also the internal volume, the visibility and the adaptation of the mask. Furthermore, it improves the mask watertightness, cancels any uncomfortable contact possibility between frame and front, and removes any vision from the inside to the frame central area. Its skirt optimizes the empty gaps and reduces the internal volume until only 85 cm3. The lens / face distance has been reduced to the limit that the skirt doesn’t make the known suction effect, it simply settles on the face providing the perfect watertightness thanks to its design and its studied relation thickness / silicone rigidity level. A subtle silicone membrane located around the nose acts as a deflector so that the warm air that comes from the nose when equalizing external pressure, does not goes directly to the crystals, reducing the fog, very common on reduced volume masks. Inclined lenses that are extended via soft curved lines over the cheekbones, improving the inferior and side visibility which are practically unlimited. The extremely thin frame and the studied assembly with the delicate frontal bone area optimize the superior visibility without damaging the adaptation ability. The buckles, assembled into the frame to achieve a better mask stability and an adjustable tension, are completely folding and tilting in all ways. That’s why the breaking possibility is almost inexistent. This kind of anchorage helps to improve also the mask stability, because the strip tension is made over a rigid element and the breathing tube and the face don’t affect to the skirt.