1. Otu ojiji naanị OA kwadoro site na Notify Isi Universal NB2163, kwekọọ na EN149: 2001 + A1: 2009 FFP3 NR.
2. Akụkụ akụkụ mpịakọta akụkụ atọ, mkpịsị aka imi edozi, yana akụrụngwa na-agbanwe agbanwe dị mma iji kpuchido ntị gị. Nko enwere iji dozie akuku nti.
3. Ihe na-anaghị egbu egbu ma na-adịghị ewe iwe.
4. Ngwunye Ngwunye Ngwunye (PFE): EN 149 ≥99%.
5. Ngwaahịa mejupụtara mkpuchi 5; nye elu urughuru na nje bacteria filtration arụmọrụ.
6. Gbochie nje, uzuzu, pollen, ikuku ikuku, anwụrụ na alụlụ.