Oxygen bar guests will pay about one U.S. dollar per minute to inhale an increased percentage of oxygen compared to the normal atmospheric content of 20.9% oxygen. This oxygen is produced from the ambient air by an industrial (non-medical) oxygen concentrator and inhaled through a nasal cannula from a few minutes to about 20 minutes.

The machines used by oxygen bars or oxygen vendors are different from the typical medical-issue machine, though customers use the cannula, the rubber tube apparatus that fits around the ears and inserts in the nostrils, to breathe in the oxygen. Customers can enhance their oxygen experience by using aromatherapy scents to be added to the oxygen, such as lavender or mint.