Cressi PERLA, Adult Small Inner Volume Silicon Mask for Scuba, Snorkeling Italian Quality Since 1946 Cressi is a REAL diving, snorkeling and swimming Italian brand, since 1946. A mask particularly suitable for Free Diving and Snorkeling, but just as appropriate for use in Scuba Diving. It has separate lenses, made in Tempered Glass and treated with Anti-fog Solution. It is made with soft Silicone, clear or dark, to insure better comfort and seal than the common plastic. It comes with strong rapid Action Buckles to adjust the Length Strap.