N95 Maskis ua tau lub tshuab ua pa (ua pa), lub tshuab ua pa yog ib hom khoom siv tiv thaiv kev ua pa, hauv kev tsim piv nrog nruab nrab lub ntsej muag sib xyaw ntau lub ntsej muag kom zoo dua, tuaj yeem lim tau cov particleates hauv huab cua.Ntawm rau tsis tuaj yeem tiv taus roj, uas tuaj yeem siv txhawm rau tiv thaiv qhov tsis muaj roj tawm ntawm qhov tawm ntawm cov ntu.95 txhais tau tias kev ua kom zoo dua qub lossis ntau dua 95%, qhia tias tom qab ntsuas kev soj ntsuam zoo, lub tshuab nqus pa tuaj yeem tiv thaiv tsawg kawg 95% ntawm cov me me (0.3-micron qib) cov khoom kuaj.
Los ntawm cov qauv siv, yog tias raws li tus neeg hnav' s tus kheej kev tiv thaiv muaj peev xwm ua ntej qib (los ntawm qib siab mus rau qis): N95 daim npog> daim npog ntsej muag phais> ntsej muag phais tshwj xeeb> daim npog qhov ncauj paj rwb zoo tib yam.
Yog tias hnav kom ncaj, N95' s pom muaj peev xwm zoo dua li ntawm qhov ua niaj zaus thiab phais qhov ncauj qhov ntswg. Txawm li cas los xij, txawm tias tus neeg hnav zoo rau daim nqi txig, qhov kev pheej hmoo ntawm kev kis tus mob lossis kev tuag tsis yog 100% tshem tawm.
Txhua qhov, KN95 yog ib qho ntawm qib uas tau teev nyob rau hauv Suav tus qauv gb2626-2006, N95 yog ib qib uas tau teev tseg hauv Asmeskas tus qauv 42 CFR 84. Cov txheej txheem kev ntsuas thiab kev ntsuas ntawm ob theem yog qhov zoo ib yam. Qhov ua haujlwm pom tau yog 95% raws li cov qauv coj ua.