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An FFP (filtering facepiece) mask (also called respiratory protection mask or simply respirator) is a type of protective mask certified by the European Union that serves to protect against particulates such as dust particles. The EN 149 standard defines three classes of filter efficiency for these masks, namely FFP1, FFP2 and FFP3.
It is an example of a mechanical filter respirator.
The mask is a half-face mask, which means that it protects the chin, nose and mouth. The mask must meet certain standards and effectiveness tests. Efficacy is assessed by the filtration rate (filter penetration, also referred to as efficiency), as well as the degree of leakage around the edges. The mask should be correctly adjusted to the face.
This type of mask, unlike the surgical mouth mask, protects the wearer from inhaling infectious agents or pollutants in the form of aerosols, droplets, or small solid particles.

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