N 95 yog theem kev lees paub ntawm Asmeskas cov neeg nqus pa, ntawv pov thawj los ntawm National Institute of Occupational Safety thiab Health (NIOSH). Daim npog ntsej muag no tuaj yeem lim tawm ntau dua li 95% ntawm cov khoom tsis muaj roj (aerosol) raws li cov cua teev (85 L / min), yog li nws tau npe N 95 Cov. Thiab yog tias nws tuaj yeem lim ntau dua 99% ntawm cov teeb meem me me (aerosol), nws yog hu ua N 99 daim npog ntsej muag. Ib qho ntxiv, sib thooj rau N 95, KN 95 yog daim npog ntsej muag tau pom zoo los ntawm tus qauv ntawm GB2626-2006 Kev Tiv Thaiv Kev Tawm Tsam Yus Tus Kheej Kev Ntxub Ntxaug Kev Ntxaug Nrig Kev Ntxaug.
