Size: one size
Material: 4 layer fabric
Filter: 5 layer
Packing: one piece per polybag
Function: protective, dustproof,anti -virus
Advantage: breathable, easyclean. softness, quick drying
With valve
One mask with one filter in.
Type: reusable,changeableCustomized Disposable Mask
website:http://www.szhrmasks.com/mask/disposable-mask/