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 doesnt 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.