Table 2.

Different types of respirator mask to be used for personal protective equipment

Respirator types	Property
FFP1	Suitable for particles larger than 5 μm, 80% aerosol filtration maximum, and 22% leakage to the inside, mainly used as a dust mask (home renovations and various types of work)
FFP2	Suitable for particles between 2 and 5 μm with a minimum 94% filtration and maximum 8% leakage to the inside, mainly used in construction, agriculture, and healthcare professionals against influenza viruses. They are currently used for protection against the coronavirus
FFP3	The most filtering mask of the FFPs, suitable for particles smaller than 2 μm with a minimum 99% filtration and maximum 2% leakage to the inside, using against very fine particles such as asbestos
N class	No oil resistance. A distinction is made between N95, N99, and N100 suitable for particles larger than 0.3 μm, and the number after the letter indicates the percentage of filtration of suspended particles
R class	Resistant to oil for up to 8 hours. Similar to the N class, a division is made between R95, R99, and R100, suitable for particles larger than 0.3 μm
P class	Class P: a completely oil-resistant mask. There are also P95, P99, and P100

FFP, filtering facepiece