There is a wide selection of oxygen masks on the market today, and they can be put into three fundamental classes. There are those veils that are utilized by specialists in healing centers for patients who are experiencing trouble breathing and they are known as adult oxygen masks;others are utilized by pilots because of the high height conditions that they normally encounter; and ultimately there are those that are utilized in unforgiving situations where there is constrained supply of oxygen. Another zone incorporates those industries that make chemicals that are typically unsafe to people. Oxygen masks are also used when there is a fire flare-up event. The principle distinction between these breathing devices is generally the way the veil is fixed to the face, the plan of the cover, the toughness of the material utilized as a part of planning the veil and the strategy by which oxygen is provided to the veil. The masks utilized by the pilots are constructed so that the oxyge