Known simply as the MOD-1, the patented Kirby Morgan two-chamber (Mask and POD) design opens up a myriad of configuration possibilities with both Open Circuit systems and Closed Circuit Rebreather systems.>Used by United States Marines Combat Divers and Military Dive Teams around the world, Professional Underwater Videography Teams and Scientific Dive Teams, the Kirby>Morgan Modular Full-Face Mask represents a giant step-up in safety, versatility and convenience over conventional Full-Face Masks (FFMs).>The MOD-1 utilizes two separately sealed cavities in a single FFM design. The Mask acts exactly like an independently sealed dive mask with a lower Breathing POD that contains the mouthpiece and, if installed, the communications microphone.>Hollis is excited to partner with Kirby Morgan Dive Systems, Inc, the pre-eminent designer of commercial and military diving systems, to bring our divers a product, the MOD-1 with Hollis BOV POD, which will expand possibilities in diving safety, reliability and versatility