... face masks:disposable face mask:non-woven face masks:3-ply face masks:non woven mask:disposable non-woven face mask ... non-woven high-quality filter paperCraftsone-ply,two-ply,three-ply,four-ply,first-ply:25g-45g,Second to forth-ply:20g-30gColorWhite, light blue ,light greenFunction1 ...