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 Mask Material - Non-Washable - Polypropylene, BFE 99.5%, 30 GSM.
"Spun Lace" Center Mask Material - Washable - Polyester, BFE 98.2%, 35 GSM.
BFE - Bacterial Filtration Efficiency