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If there is even the slightest crack around the perimeter of the mask, unfiltered air will be able to enter. The smoke contained particulate matter ( PM ) , which can cause respiratory issues, so I bought a N95 mask to wear when the air quality was bad. Sanqi 3Q SQ100Sb N95 photos gallery album como funciona mascara N95 if you work outside or in an environment where dust and other small particles can irritate your eyes or nose—even if they don't necessarily endanger your lungs—disposable respirators can help reduce irritation without interfering with your vision or trapping you inside something bulky and uncomfortable. Thus they are regarded acceptable for use in potentially hazardous areas. Should you get rid of old masks.
