An oxygen lounge or oxygen bar is a place that offers non-medical oxygen mixed with various scents including aromatherapy. The air we normally breathe contains about 21% oxygen the rest is Nitrogen, Argon and other trace gasses. The oxygen in an oxygen lounge is between 90% and 92% oxygen allowing you to breathe 4 to 5 times the normal amount of oxygen. You choose the scents you would like and place the nose hose in your nostrils and then just relax. Then just breathe in all the benefits! Most people choose to enjoy 10 to 20 minute sessions.