How KO2 is used to mountaineers for breathing in water?

KO2 is potassium superoxide. It reacts with carbon dioxide to form potassium carbonate and oxygen. This reaction makes the potassium superoxide useful in a self-contained breathing devise. It can be used my mountaineers, divers, or anyone who needs or wants to breath under water. The amount of oxygen the devise would make would vary based on how much K02 is available.