These masks have a multi-layer structure. For the general population, this mask type is the right choice to protect against infections in public.
These masks provide reliable protection against particles in the air. For this purpose, they must be worn close to the face - and not used repeatedly. There are various standards worldwide for measuring the performance of protective masks. The European standard FFP2 filters out at least 94 percent of all particles in the air from a size of 0.6 μm. These masks seal tightly against the face and thus protect the wearer from aerosols in the air.