KN95 Face Mask, Pack of 5 or 25 Masks. Manufacturer varies based on supply. The 4-Ply Non-Woven layers are made of soft quality materials to not only ensure protection but maximize comfort. The form fitting nose guard is designed to mold to the users nose and provide a firm seal. The vertical seal also ensures a folding feature for easy transport and storage in pocket or drawer. This product is NOT included on the FDA Emergency Use Authorization List. The CDC tested limited number of masks from this manufacturer and found that the filtration efficiency was above 95%. See the CDC website for a copy of the testing report.