3 Ply Surgical Mask = One Ply of Melt Blown + 2 Ply Spun Bond Fabric. 3 Ply Non Surgical Masks =3 Ply of Spun Bond Fabric Masks Are Fda, en 149:2001, C.e. Certified. Melt Blown Fabric Used in Our Mask Is Sitra Certified. Test Report Indicates That Bacterial Filtration Efficiency in Our Mask Is More Than 99% Company Is C.e., I.s.o., F.d.a. , W.h.o. Gmp Certified.