Grim Sea is developing Freebreathe Technology, a ‘Semi-Demand Gas Reclaim’ system that increases safety, improves the diving experience and extends boundaries.

A unique counterlung allows the compressor and diver’s umbilical to be significantly reduced in size. The system is inherently reliable with only two moving parts in the main breathing circuit. A rebreather incorporated into the diver’s backpack provides several hours backup should the main system fail. The initial product will be a surface supply mixed gas diving system.
Meanwhile this site will:

Update 23rd April: Benefits section online

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Freebreathe