FFP1 mask
Chigoba cha FFP1 ndiye chigoba chocheperako mwa atatuwo.
Kusefera kwa Aerosol: 80% osachepera
Kutulutsa kwamkati: kupitirira 22%
Amagwiritsidwa ntchito makamaka ngati chigoba chafumbi (mwachitsanzo ntchito za DIY). Fumbi lingayambitse matenda a m'mapapo, monga silicosis, anthracosis, siderosis ndi asbestosis (makamaka fumbi lochokera ku silika, malasha, chitsulo, zinki, aluminiyamu kapena simenti ndizowopsa zomwe zimachitika kawirikawiri).
FFP2 mask
Masks amaso a FFP2 okhala ndi valavu yotulutsa mpweya komanso opanda mpweya
Kusefera kwa Aerosol: 94% osachepera
Kutulutsa kwamkati: mpaka 8%
Chigobachi chimapereka chitetezo m'malo osiyanasiyana monga mafakitale agalasi, zoyambira, zomangamanga, mafakitale azamankhwala ndi ulimi. Amayimitsa bwino mankhwala a ufa. Chigobachi chitha kukhalanso ngati chitetezo ku ma virus opuma monga fuluwenza ya avian kapena matenda opumira kwambiri okhudzana ndi coronavirus (SARS), komanso motsutsana ndi mabakiteriya a mliri wa chibayo ndi chifuwa chachikulu. Ndizofanana ndi chopumira cha US-standard N95.
Masks a FFP3
FFP3 nkhope mask
Kusefera kwa Aerosol: 99% osachepera
Kutulutsa kwamkati: kupitirira 2%
Chigoba cha FFP3 ndiye kusefa kwambiri kwa masks a FFP. Zimateteza ku tinthu tating'ono kwambiri monga asibesitosi ndi ceramic. Sichiteteza ku mpweya komanso makamaka ma oxide a nayitrogeni.