Non Woven n95 mask: 1) Material: nonwoven+filter+neele punched; 2) Layer: 3ply; 3) Free of maintenance; 4) Dust mast. We are factory ... ,produce all kinds of dask.And most of our products passed CE,N95 N95 Mask / Silicone ... ,polishing and cutting,disintegration engineering,smashing,etc. disposable non woven cloth dust mask n95 standard