Oxygen is one of the vitals of a Duplicant.

It tells how much oxygen the Duplicant has left inside his body from breathing in breathable gas. Duplicants can survive for a while while they hold their breath using up that oxygen depot but they will suffocate if it isn't replenished fast enough.

The gas oxygen is converted in the body into carbon dioxide.The rates can be impacted by traits.

Factor Base Value Positive Trait Negative Trait
Oxygen Consumption 100 g/s Diver's Lungs (-25 g/s) Mouthbreather (+100 g/s)
Carbon Dioxide Production 20 g/s None None