N95 and R95 Respirators - The Difference? - Major Safety- r95 vs n95 หน้ากากไวรัส ,The N95 and R95 nomenclature originate with, and are approvals from, NIOSH. NIOSH is the National Institute for Occupational Safety and Health. It is the government agency that tests the respirators to verify they actually filter what they are marketed to filter.

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