Tested by NIOSH’s National Personal Protective Technology Laboratory (NNPTL), the KN95 masks exceed NIOSH’s N95 standard of 95 percent for filtration purposes during in-house testing with a maximum filter efficiency of 99.69 percent and a minimum of 99.48 percent. These masks are included in the FDA’s Appendix A—Authorized Imported, Non-NIOSH Approved Respirators Manufactured in China.
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