Oceanic Ultradry Snorkel and Aeris Duo Mask Snorkel Set, BK-YL Patented Dry Snorkel Technology virtually eliminates water entry without sacrificing performance | Oversized purge valve for easy clearing | Quick-release swiveling snorkel keeper Drop away smooth bore flex mouthpiece | Replaceable 100% liquid silicone mouthpiece and purge valve Lightweight, uniquely styled Soft-Touch frame | Generous tear-drop lens design guarantees a great view of your surroundings Highest grade, ultra-soft 100% liquid silicone skirt for a positive seal and long life | Low volume design for better visibility and easier clearing Tempered glass lenses | Easy-to-adjust, swiveling buckles