Second StageCompact and lightweight second stage improves comfort and helps reduce jaw fatigue on long duration dives.Large heat exhanger to improve cold water preformance and freezing resistance. High performance pneumatically balanced lever operated poppet valve.Large, over moulded self-flushing and controllable purge button.Ergonomic Venturi lever is easy to use and locate. Flexible nylon braided hose has better cold water performance than a traditional rubber hose.Standard metallic hose connection for interchangeability.Comfo-bite mouthpiece has a unique bridge that fits across the upper palate and does not require bite pressure to stay in place.Re-useable mouthpiece clip makes it simple to change mouthpieces in the field.Durable and flexible rubber exhaust tee provides excellent bubble diversion.UV inhibitors to help prevent discolouration of the white materials.