Non-Rebreather Oxygen Mask is a high-concentration oxygen delivery interface featuring a one-way valve system and attached reservoir bag that allows the patient to inhale nearly pure oxygen from the reservoir without rebreathing exhaled air. It is used for patients with acute hypoxemia requiring the highest available oxygen concentration from a non-invasive mask delivery system.

Non-rebreather masks are typically used in high-acuity situations and are run at flow rates sufficient to keep the reservoir bag inflated. OxyCare supplies non-rebreather masks for home and hospice oxygen therapy setups.