Plastic Oxygen Mask is used primarily by medical care providers for oxygen therapy as they are disposable and reduce cleaning costs and infection risks. It can determine the accuracy of oxygen delivered in many various medical situations requiring treatment with oxygen. Plastic Oxygen Mask is used to deliver oxygen to people who do not otherwise get enough of it. These are commonly used to provide relief to people with respiratory disorders. A nasal cannula consists of a flexible tube that is placed under the nose.