The Deep See Adventure Set Silicone Mask and Snorkel contains a top quality silicone Adventurer II Mask and a Dolphin Snorkel with purge valve. The Deep See Adventure Set Silicone Mask and Snorkel is a great value in a quality starter set you will enjoy wearing in the pool or at the beach. The Adventurer II Mask has a robust but lightweight frame with a high quality liquid injection silicon skirt and low volume two-tempered glass that gives a tight seal and great visibility. The Dolphin Snorkel with Purge Valve features an elliptical upper tube and corrugated flex section that is more streamlined than conventional snorkels.