EFX
Contributor
Air is "Nitrox", it is 21% oxygen....
Nitrox refers to a mixture of Oxygen and Nitrogen as the primary components (trace other elements).
YMMV
When you see a girl at the bar go up to her and say, "Hi. The scuba diving is great here. I did some dives on normoxic nitrox. Can I get you a drink?"
Works every time.