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NIOSH-approved disposable particulate respirator

a NIOSH-certified, negative pressure, particulate respirator with a filter as an integral part of the facepiece or with the entire facepiece composed of the filtering medium. They differ from other respiratorsbecause the filtering media itself is the mask. Negative pressure means that the flow of air through the filter is achieved via inhalation. This type of respirator is commonly used for protection against bioaerosols and dusts.

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