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of quality environment
A disposable face mask is a loose-fitting device that creates a physical barrier between the mouth and nose of the wearer and potential contaminants in the immediate environment. The mask is three-ply ( three layers ), made up from a melt-blown material placed between non-woven fabric. The melt-blown material acts as the filter that stops microbes from entering or exiting the mask.
An N95 mask or N95 respirator is a particulate respiratorwith a filter that meets the N95 NIOSH air filtration rating. N95 respirators are considered functionally equivalent to certain respirators regulated under different jurisdictions, such as FFP2 respirators of the European Union and KN95 respirators of China.