Daxus' metal nose plug filters
I know it looked really cheesy, Daxus' metal nose plug filters. He wore those throughout ULTRAVIOLET and it looked funny. But, it wasn't total make-believe. The U.S. military reputedly experimented several years ago with such nose plug filters. At the time it made sense, because of the extremely dusty and sandstorm environment of Irag. While the nose filter plugs may have worked, it supposedly obstructed normal airflow into the lungs, especially as the filters became clogged with dust and grit. This would compel the user to breath through the mouth, defeating the purpose of the filter. At best, the nose plug filter could only be a short term usage affair, and if the soldier was not physically exerting himself for very long.
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