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2. Dust mask - Wikipedia

   en.wikipedia.org/wiki/Dust_mask

   A notable occupational use of dust masks is in farming, where dust masks are used to avoid the effects of farmer's lung, a disease caused by the inhalation of dusts from agricultural products. [1] The toxicity mainly comes from allergy to mold in the dust, which can lead to lung damage due to the immune response, [ 7 ] as opposed to an inherent ...

3. Mechanical filter (respirator) - Wikipedia

   en.wikipedia.org/wiki/Mechanical_filter_(respirator)

   The protection provided by an FFP2 (or FFP3) mask includes the protection provided by a mask of the lower-numbered classes. A mask conforming to the standard must have its class written on it, along with the name of the standard and its year of publication, as well as any applicable option codes, e.g. “EN 149:2001 FFP1 NR D”.

4. N95 respirator - Wikipedia

   en.wikipedia.org/wiki/N95_respirator

   An N95 respirator is a disposable filtering facepiece respirator or reusable elastomeric respirator filter that meets the U.S. National Institute for Occupational Safety and Health (NIOSH) N95 standard of air filtration, filtering at least 95% of airborne particles that have a mass median aerodynamic diameter of 0.3 micrometers under 42 CFR 84, effective July 10, 1995.

5. Target, Walmart and 5 More Retailers Requiring Masks as ... - AOL

   www.aol.com/retailers-requiring-masks-delta...

   Due to the surge in the COVID-19 Delta variant and updated guidance on masks from the Centers for Disease Control and Prevention, several retailers are reverting to requiring masks. Many of these...

6. Elastomeric respirator - Wikipedia

   en.wikipedia.org/wiki/Elastomeric_respirator

   Elastomeric masks must be individually fit-tested and inspected for full efficacy. [2] They may be somewhat easier to fit than filtering facepiece respirators. Older mask designs were designed only to fit young adult men of average weight and a narrow range of ethnicities; newer ones use updated anthropometry and fit more people. [5]

7. Respirator - Wikipedia

   en.wikipedia.org/wiki/Respirator

   These respirators are sometimes known as dust masks for their almost exclusive approval only against dust nuisances: In Europe, regulation allows for dust masks under FFP1, where 20% inward leakage is allowed, with a minimum filtration efficiency of 80%. [130] South Korea allows 20% filter leakage under KF80.