What does nitrox typically contain in comparison to regular air?

Nitrox typically contains more oxygen and less nitrogen in comparison to regular air. Regular air consists of approximately 21% oxygen and 79% nitrogen. In contrast, nitrox is a mixture that usually contains a higher percentage of oxygen, commonly ranging from 32% to 40%, and consequently a lower percentage of nitrogen. This change in the gas mixture has implications for diving, particularly in terms of reducing the risks associated with nitrogen narcosis and decompression sickness, as lower nitrogen levels can mean less nitrogen absorption in the body during dives.

Using nitrox allows divers to extend their bottom times at certain depths while maintaining safety from nitrogen loading, making it a valuable tool for both recreational and professional diving. The idea is that by increasing the oxygen content, divers can benefit from the enhanced oxygen availability, which can aid in better performance and recovery during and after dives.