Mask ea sefahleho / mochini o phefumolohang o lahliloeng oa 3ply o entsoe ka likarolo tse 3 tsa li-filters:
1st : Lera le ka ntle-PP e sa lohiloeng;
2nd: Lera le phahameng la sekhahla-PP e qhibilihisitsoeng;
Ea boraro: Lera la tlhokomelo ea letlalo-PP masela a sa lohiloeng.
E kena ka holim'a nko le molomo.E tlosa likaroloana tse nyenyane haholo moeeng oo u o hemang.Likaroloana tsena li kenyelletsa likokoana-hloko (joaloka livaerase, libaktheria le hlobo) le mefuta e meng ea lerōle.Maske a lahliloeng ha a na likarolo tse ncha, tse reretsoeng ho lahloa kamora ho sebelisoa.