Cressi Calibro Diving Mask | One Size | Black The new Cressi Calibro Mask is a next generation dive mask that is equipped with the IDF-INTEGRATED DUAL FRAME TECHNOLOGY which offers an exceptional field of view! It is light, durable and created to deliver performance on all fronts.  The mask is designed so that the integrated face and frame allows for an extremely hydrodynamic and compact shape and a particularly wide lens. It combines minimal internal volume with a phenomenal field of view due to the raked angle of the frame. The buckles are 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. With the matte coating the masks components all match, enhancing the underwater experience. It prevents reflections in the water that may disturb marine life. Calibro is the perfect mask for free-diving since it is designed to provide the diver with a feeling of total freedom and comfort. Ideal for all your diving adventures - performance inspired! Features  U.S. PAT 6272693 B1 INTEGRATED DUAL FRAME ULTRA LOW VOLUME TEMPERED GLASS FLEXIBLE BUCKLE MICROMETRIC ADJUSTABLE BUCKLE