Oxygen Mask We are engaged in offering Oxygen Mask (Adult). Oxygen mask is a device that provides the ability to transfer breathing oxygen gas from a tank storing oxygen to the lungs of the patient. Oxygen masks come in many different types and sizes, and may cover the mouth and nose, or sometimes the entire face. Rubber and Silicone oxygen masks are designed to provide a tight seal, and are often used by aviators, medical research subjects, and other patients that need a dose of pure oxygen to be administered.