These disposable masks have several layers of different fabrics, including a polypropylene filter, made by “melt-blowing” polymer to create miniscule, irregular fibre patterns that can trap the smallest airborne particles.
FFP2 is the equivalent European standard, N95 is the term to refer to the American Standard for this type of mask. FFP stands for “filtering face piece”. It is a European standard for mask efficiency, ranging from one, the lowest grade, to three, the highest. FFP2 masks filter at least 94% of all aerosols, including airborne viruses such as covid-19. America’s N95 and China’s KN95 masks provide similar levels of protection.