Big Eyes Mask with Alpha Ultra Dry Snorkel. The perfect combination: a top-notch diving and snorkeling set, consisting of the Big Eyes Evolution mask and the Alpha Ultra Dry snorkel. The diving mask with an extremely small internal volume features an innovative anti-fog system. The technologically advanced snorkel has a tube made from special, innovative polymers with high elasticity. This allows for great flexibility of the snorkel when encountering obstacles, while also enabling it to quickly return to its original position.