Disposable face mask filter- One time use. Suggest replace the fliters every day of uses for the best effect.
How to use- Open a mask pad,tear stickers.Then place the mask pad to stick within the masks slip.
Safer materials- 3 Layer mask filters,There are two layers of non-woven fabric on the outside and a layer of melt-blown Fabric on the middle.
Fliters size- Flters size measures approx. 13x13 cm/ 5.1 x 5.1 inches, compatible with most dust masks,cotton masks or disposable face masks.
Package includes- 20x mask filter pads ,not include masks.