Face Mask Filter Material for mask construction. 7" wide, sold by the yard. "Spun bond" Inner & Outer Mask Layer - Washable - Polypropylene, 25 GSM. "Melt Blown" - Center...
Face Mask Filter Material for mask construction. 7" width sold by the yard "Spun bond" Inner & Outer Mask Layer - Washable - Polypropylene, 25 GSM "Melt Blown" - Center...