The Cressi F-Dual & Supernova Dry Snorkel is the perfect snorkeling set for any underwater enthusiast. Featuring an F-Dual Dry Snorkel with an upper valve that seals the air chamber when submerged, it ensures no water enters the tube. The Supernova Dry snorkel has a special “anti-splash” top to prevent water from entering the snorkel. The F-Dual and Supernova snorkels also have a comfortable, soft silicone mouthpiece that ensures an excellent fit. Plus, the patented ergonomic shape provides a natural fit and feel with minimal jaw fatigue. With the Cressi F-Dual & Supernova Dry Snorkel Set, you can explore the depths of the ocean with confidence and comfort.