(5) FFP masks - These masks are manufactured in Europe and are available in three varieties - FFP1, FFP2 as well as FFP3. The third variety are highly efficient for filtering out as high as ninety ...
A variety of commercial masks, left to right: FFP3 industrial dust mask, T32610-2016 surgical-style mask, very cheap unrated single layer dust mask. If you have a supply of the top-spec medical ...