The Aqua Lung Helix Pro Octopus is the alternate air source built on the Helix Pro second stage, so a donated regulator breathes the same way the primary does. Heat exchangers in the second stage move ambient warmth into the gas path to resist icing in cold water.
An in-line venturi knob sized for gloves reduces free flow while the octopus hangs unused, and the high-visibility yellow cover makes it quick to locate. The Comfo-Bite mouthpiece holds position without clenching.
