![]() ![]() ![]() ![]() Description of Related Art In the course of aircraft operation, various personnel, including but not limited to pilots, navigation officers, and other flight crew personnel, may need a mask system to provide breathing oxygen and also to provide protection from smoke from onboard fires and other possible airborne eye and lung irritants which may enter the crew compartment(s). Field of the Invention This invention relates to face mask systems for protection from atmospheric pollutants and the supply of oxygen to the mask wearer and more particularly to mask systems to supply oxygen for use in oxygen-depleted environments during aircraft decompression, smoke from onboard fires, airborne debris or other toxic gases which may enter the aircraft flight deck or other crew compartments. ![]()
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