non-woven active carbon face mask 1.4ply 2.size:17.5*9.5cm as ... 3.certification:CE, ISO9001, ISO13485 4.BFE>>95% non-woven active carton face mask with tie-on, 4-ply. 1. Appearance: clean ... 17.5x9.5cm (length x width) After user wear face mask, the face mask can cover nose, mouth and lower jaw.4 ... .6. Liquid barrier: Surface anti-wet: the surface of face mask is not stick water.7. Filtering effect: PFE is ...