Kapitol Reef™ snorkel, the world’s first pressure-regulated snorkel. Envisioned and developed by Mark R. Johnson, M.D., this revolutionary dry snorkel uniquely regulates exhalation pressure and separates fresh ready-to-inhale air from exhaled carbon dioxide. Kadence Technology uses precision-engineered valves to carefully regulate exhalation pressure and balance it with external water pressure.  Separates inhaled air from exhaled air. Stays amazingly dry. Comes with quality protective bag, informative owners manual and warranty card.