Disposable respirator masks are given an FFP class according to the level of protection they provide, based on requirements laid out in the EN 149 safety standard.
FFP3 respirators provide the highest level of protection that a disposable respirator mask can offer. These respirators can protect you from fine toxic particles such as asbestos, bacteria, and radioactive particles.
Meanwhile, FFP1 respirators provide the lowest level of protection. They can protect you from non-toxic particles like brick dust, cement, gypsum, and limestone.