Meltbrown fabric specifies surgical and safety mask’s bacteria and virüs filter quality. The masks without Meltbrown fabric do not provide the safety conditions against bacterias and virüses. The middle layer of the IMSafe 3 Layer Masks includes a Meltbrown fabric that has a min 95 percent Bacteria Filtration Event (BFE). We use Meltbrown fabric in the inner side’s two layers of the 5 Layer N95 (FFB2) Mask, and the fabrics Bacteria Filtration Event (BFE) is between 95 to 98 percent.