Oxygen mask
![A simple face mask](/Images/godic/202501/02/Simpleface0348.JPG")
![A non rebreather face mask](/Images/godic/202501/02/NRBer0348.JPG")
![A T-37 pilot wearing a mask designed for both diluter- and pressure-demand breathing](/Images/godic/202501/02/T-37_solo_student_pilot0348.jpg")
![Inner view of a military aviators mask showing face seal, facepiece and inhalation valves](/Images/godic/202501/02/Tightlysealedmask0348.jpg")
An oxygen mask provides a method to transfer breathing oxygen gas from a storage tank to the lungs. Oxygen masks may cover the nose and mouth (oral nasal mask) or the entire face (full-face mask). They may be made of plastic, silicone, or rubber.
In certain circumstances, oxygen may be delivered via a nasal cannula instead of a mask.