An oxygen mask covers the nose and mouth, making it the right choice when prescribed flow rates are too high for comfortable cannula use, or for users who breathe mostly through the mouth – including during sleep or recovery. Fit the mask so it seals gently over the nose and mouth, adjust the elastic strap, and press the nose clip to shape. Connect the tubing to your concentrator or regulator outlet and set your prescribed flow. Note: at low flow rates a mask can feel stuffy and may not be appropriate – most users below about 5 L/min are better served by a nasal cannula. Always follow your prescriber’s guidance. Replacement guide: single-patient consumable – replace regularly, after any illness, or when the material discolours or stiffens.
