... :melt-blown fabric, hypoallergenic, fiberglass free, latex free, fluid resistant with enclosed aluminum nose piece.3. Use for sanding, sweeping, grinding ... medicine, disintigration projects, cement, etc;4. Lead time:For sample mask, the lead time is 3-5 days;For mass production ... x 25 CM G.W./N.W.: 7/5KGS Cheap Face Mask 250g/sqm with Earloop,Disposable Dust ...