N9 5 Face Ma-SKS Replacement Filtering Pad Breathable Gasket Skin Friendly Respiring Mat,Replacements Disposable Pad Mouth Filter Insert Protective，Protection Sheets Cotton Pad for Outdoor (100PCS)

الوصف

If the má-sk is not replaced for a long time, the defense effect will be reduced. The use of disposable másk filter can prolong the service life of the másk.