Genesis Prana High Performance OctopusSteeped in tradition of the GS2000, the Prana Octopus delivers on the expectations around the world for breathing performance, durability, longevity, and styling. This top performing regulator is designed to perform in a wide variety of extreme conditions. The dry environmentally sealed flow by piston 1st stage with the patented Dry Air Demand (DAD) will perform consistently regardless of depth or tank pressure. The fine tune breathing resistance 2nd