The EN 149<unk> defines performance requirements for three classes of particle-filtering half masks:<unk> 1,<unk> 2 and<unk> 3. The protection provided by an<unk> 2 (or<unk> 3) mask includes the protection provided by a mask of the lower-numbered classes. A mask conforming to the<unk> must have its class written on it, along with the name of the<unk> and its year of publication, as well as any applicable option codes, e.g. “EN 149:2001<unk> 1 NR D”. Some manufacturers use in addition the colour of the elastic band to identify the mask class, however, the EN 149<unk> does not specify any such colour coding and different manufacturers have used different colour schemes. Class Filter penetration limit (at 95 L/min air flow) Inward leakage Typical elastic band<unk> 1 Filters at least 80% of airborne particles <22% Yellow<unk> 2 Filters at least 94% of airborne particles <8% Blue or White<unk> 3 Filters at least 99% of airborne particles <2% Red<unk> 1 mask<unk> 1 face mask It is the least filtering mask of the three. *Aerosol filtration percentage: 80% minimum. *Internal leak rate: maximum 22%. It is mainly used as a dust mask (for example for DIY jobs). Dust can cause lung diseases, such as silicosis, anthracosis, siderosis and asbestosis (in particular dust from silica, coal, iron ore, zinc, aluminium or cement are common particulate risks).<unk> 2 mask *Aerosol filtration percentage: 94% minimum. *Internal leak rate: maximum 8%. This mask offers protection in various areas such as the glass industry, foundry, construction, pharmaceutical industry and agriculture. It effectively stops powdered chemicals. This mask can also serve as protection against respiratory viruses such as avian influenza or severe acute respiratory syndrome associated with the coronavirus (SARS), as well as against the bacteria of pneumonic plague and tuberculosis. It is similar to the US-standard N95 respirator.<unk> 3 mask<unk> 3 face mask *Aerosol filtration percentage: 99% minimum. *Internal leak rate: maximum 2% The<unk> 3 mask is the most filtering of the<unk>  masks. It protects against very fine particles such as asbestos and ceramic. It does not protect against gases and in particular oxides of nitrogen.
FFP standards
Boxed warning
Med-Vet-Net
MedAccred
TousAntiCovid
MedMagLabs
International Red Cross and Red Crescent Movement
Excellus BlueCross BlueShield