... in 3 layers of non-woven fabrics3.BFE95%, BFE99% filter paper and Normal filter paper4.Standard mask size: 17.5cm*9.5cm5.Standard ... , 2000PCS/CTN 100% BRAND NEW Surgical Face Mask, with a filter encased in 3 layers of non-woven fabrics. It has ... health to you! Item Details: 1, Anti-Flu, with a filter encased in 3 layers of non-woven fabrics2, With elastic ...