POLYESTER NON-WOVEN FABRIC: Blocks large particle dust. _x000D__x000D_
MELTBLOWN FILTER LAYER: Physical adsorption. electrostatic adsorption._x000D__x000D_
Filtration of oily and non- oily particulate matter._x000D__x000D_
STEREO-SHAPED COTTON：For better stereotypes and support for stereoscopic. _x000D__x000D_
3D design.