Hollis Prism 2 Rebreather Counterlung Option:Back Mounted Counterlung w/Petrel (Metric) The B2 octopus is easily

The B2 octopus is easily the most comfortable and easy to use safe second ever designed with all-Titanium construction for corrosion protection and light weight

making it a versatile upgrade for diving setups

This model features two channels with channel 1 at normal power and a second mode with reduced power to help maintain sound clarity in confined waters such as pools

Designed for practical weight distribution and reliable performance

Katana 2 is also the first sidemount harness in the world to be designed with closed circuit sidemount capability

Hollis Prism 2 Rebreather Counterlung Option:Back Mounted Counterlung w/Petrel (Metric) The B2 octopus is easilyTechnically Focused The PRISM 2 is an electronically or manually controlled, constant PO2, modular, closed circuit diving system. As open circuit (SCUBA) divers, we rely upon filling our lungs with air from a pressurized gas tank with every inhalation and then exhausting that volume of air into the surrounding water with every exhalation. As we descend deeper, the water pressure around us increases, and the volume required to fill our lungs increases;