“Recreational oxygen,” a term that has become somewhat synonymous with “supplemental oxygen,” “portable oxygen,” and “canned oxygen,” essentially applies to any oxygen product that is neither medical oxygen nor industrial oxygen. A stationary oxygen bar would also be considered recreational oxygen even though the oxygen creation process and purity differ from quality canned oxygen products. Under normal atmospheric conditions, ambient air contains 21% oxygen. That’s without considering the presence of compromised or polluted air. gO2 therapy, 99% Pure Oxygen, 100% Pure Life is enriched with a much higher concentration of oxygen – 4 1/2 times the normal air we breathe.