Limaske tsena tsa ho buoa tse lahloang ke Lera tse 4 tsa Polypropylene Ultrasonically Welded Together: 3 Spunbond Polypropylene Layers Kantle, 1 Meltblown Polypropylene Filter Layer Inside. Le ho sotha litsebe ka pela tsebe - kapa - tlama lenoto litsebeng tsa tsebe ho khutsufatsa. Mekhahlelo ena ea bongaka ea bongaka e koahelang sefahleho ke Maske ea Ho Buoa e Ikemiselitseng Ts'ireletso ea Metsi le ho Fana ka Ts'ebetso ea Bacterial Filtration (BFE): 99 +%.