This performance octi is about as simple as can be, yet delivers air reliably when needed.

Dependable breathing performance in a classic downstream design with a dive/pre-dive VIVA switch and reversible hose attachment.

Going down armed with a smooth-breathing backup reg doesn't have to be complicated, and it doesn't have to be expensive. The R105 OCTI is proof of that.

The R105 is a new economical second stage featuring classic downstream valve technology that has a well-earned reputation for safety and reliability. Designed to be extremely easy to use in an emergency, the R105 is pre-tuned to the optimum inhalation volume for safe and uncomplicated use - you never have to hassle with control knobs or switches, simply put it in your mouth and breathe.

The R105 OCTI combines all the features of the R105 with a high-visibility yellow purge cover and a 39-inch yellow hose that makes it that much easier to share with a buddy in need. For new divers as well as veterans looking for an economical backup breather that's simple, dependable and offers excellent visibility, the R105 OCTI is a great choice.