There are 3 levels EU PPE Masks : FFP3FFP1and FFP2 Masks.

FFP2 Mask

It is different from the US Mask FDA standard, its detection Flow rate is 95L/min, with DOP Oil Dust. 

3-ply mask

 

FFP2 Masks are similar to N95 and KN95 Masks in that they cannot be washed. Because wetting will cause static electricity release of the mask, it cannot absorb dust with a diameter of less than 5um.

High temperature steam disinfection is similar to cleaning in that the steam also causes static electricity to be released, making the mask ineffective.

The outer layer of FFP2 Masks usually collects a lot of dirt and bacteria from the outside air, while the inner layer blocks exhaled bacteria and saliva. Therefore, the two sides of FFP2 Masks should not be used alternately, otherwise they will inhale the dirt from the outer layer directly against the face and become a source of infection. When not wearing, the Mask should be folded in a clean envelope, and the side of the mouth and nose should be folded in. Do not slip the mask into your pocket or hang it around your neck.

In order to prevent infection, some people may wear a Medical Mask all day long, but this will make the nasal mucosa become fragile, lose the original physiological function of the nasal cavity, reduce resistance, therefore, in the population density is not high and ventilated places, can not wear a Mask.