FFP2 thiab N95 qhov ncauj qhov ntswg
Daim npog N95 yog ib qho ntawm 9 yam ntawm cov npog qhov ncauj tiv thaiv lub ntsej muag tiv thaiv los ntawm NIOSH (Lub Chaw Haujlwm Hauv Tebchaws rau Kev Ua Haujlwm Kev Nyab Xeeb thiab Kev Noj Qab Haus Huv). N95 tsis yog cov khoom lag luam tshwj xeeb lub npe, ntev npaum li nws tau ua raws li N95 tus qauv, thiab cov khoom lag luam uas dhau qhov NIOSH tshuaj xyuas tuaj yeem hu ua "N95 qhov ncauj qhov ntswg."
FFP2 daim npog ntsej muag yog ib qho ntawm European daim npog ntsej muag EN149: 2001. Nws lub luag haujlwm yog adsorb ua kom muaj kev phom sij, suav nrog cov plua plav, pa taws, yuam kev, cov pa roj thiab lom vapor, thiab lwm yam los ntawm cov khoom lim, thaiv nws los ntawm kev nqus tau los ntawm tib neeg.