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2. Dust mask - Wikipedia

   en.wikipedia.org/wiki/Dust_mask

   Dust masks [8] have been certified by the United States Bureau of Mines since the 1930s, [9] until being phased out after the passage of 42 CFR 84. [10] D or DM respirators, standing for 'Dust' and 'Dust/Mist' approval respectively, without approval for 'Fumes,' asbestos, radionuclides, or any certified HEPA filtration. [11]

3. Respirator - Wikipedia

   en.wikipedia.org/wiki/Respirator

   Seeking to improve on the Black Veil respirator, Cluny Macpherson created a mask made of chemical-absorbing fabric which fitted over the entire head: a 50.5 cm × 48 cm (19.9 in × 18.9 in) canvas hood treated with chlorine-absorbing chemicals, and fitted with a transparent mica eyepiece.

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. Best Face Masks for the Holidays to Give and Wear This Season

   www.aol.com/best-holiday-masks-wear-season...

   PPE masks are usually made from breathable a fabric like cotton and differ from a surgical mask and N95 respirators that ... $7.50 on Etsy. ... Disposable, dust proof, three-ply masks in a fun ...

6. US makers of masks and gloves get lifeline: higher tariffs on ...

   www.aol.com/news/us-makers-masks-gloves-lifeline...

   President Joe Biden’s move to hike tariffs on Chinese goods should help U.S.-based medical mask and glove makers, a sector that has largely flamed out after surging during the COVID-19 pandemic.

7. Mechanical filter (respirator) - Wikipedia

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

   They highlighted the risk of infection from touching the contaminated outer surface of the mask, which even professionals frequently unintentionally do, and recommended washing hands every time before touching the mask. To reduce mask surface contamination, they recommended face shields, and asking patients to wear masks too ("source masking ...