Adult High-End Scuba Snorkeling Gear | Matrix & Supernova Dry Made by Cressi: Quality Since 1946 Combination of two high end product to suitable for snorkeling and for scuba diving. Two tempered glass lenses have a tear-drop shape that allows to see clearly the scuba equipment and the underwater nature. Matrix is ideal choice for divers and free divers looking for the biggest view in the smallest package. The snorkel features a special valve that seals the tube when submerged. The snorkeling splash guard reduces the entrance of water. The water collector, featuring a purge valve, allows quick and easy expulsion of water.