50pcs disposable face mask gasket 4 layer replacement pad square cotton mat reuse use mask

suitable for many types of masks. product information: product size: square: 125 * 80mm material: non-woven disposable masks and respirators do not lend themselves to reuse because they work by trapping harmful particles inside the mesh of fibers of which they are made. but the fabric of the mask sand can be changed for reuseand the wearer should wash his hands before and after handling it and the device used to shield it.