CRESSI PRODUCTS. We underline the great success of the innovative diving mask by Cressi! CALIBRO is equipped not only with the IDF-INTEGRATED DUAL FRAME TECHNOLOGY, which offers exceptional field of view combined with minimal internal volume, but also with an ANTI-FOG SYSTEM. This is 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 channelled away from the lenses, thus avoiding the fogging up of them, but it also reduces the need to compensate for pressure. Try as soon as possible YOUR BEST COMPANION DURING YOUR DIVING TOURS!