Medical mask, 1 international standard:EN149:2001,FFP1,FFP2,CE,N95 2 material without any toxic,irritating. 3 special 3-ply design,high filtration and static electricity material to resist normal toxic and tiny micro particle 4 Suited to mining,building,grinding drugs,casting,agriculture,farming,ececttonic,food processing,cement textile,disintegration,carving,heavy metal pollution,glass...etc workshops.