KN95

Borrowed from Chinese KN95, from Mandarin 口罩 (Kǒuzhào) +‎ English N95, from an initialism of Not resistant to oil particles with 95% filtration efficiency in NIOSH air filtration ratings.

KN95 (countable and uncountable, plural KN95s)

1. (uncountable) An air particulate filtration standard originating in the People's Republic of China, which requires filtration of 95% of air particulates that are 0.3 microns and larger.
   • 2022 January 14, Tara Parker-Pope, “How to Find a Quality Mask (and Avoid Counterfeits)”, in The New York Times‎^[1], archived from the original on 15 January 2022:

     “No one has made this easy, that’s for sure,” said Bill Taubner, president of Bona Fide Masks, the exclusive distributor in the United States for both Powecom and Harley KN95 masks, which are from China. “A lot of people end up doing a lot of research.”

2. (countable) Ellipsis of KN95 filter, a filter implementing the standard.
3. (countable) Ellipsis of KN95 mask, a facemask using a filter conforming to the standard.
   • 2022 January 14, Tara Parker-Pope, “How to Find a Quality Mask (and Avoid Counterfeits)”, in The New York Times‎^[2], archived from the original on 15 January 2022:

     Unlike cloth masks, high-quality masks — called N95s, KN95s and KF94s — are made with layers of high-tech filtering material that trap at least 94 to 95 percent of the most risky particles.

• N95 (U.S. standard, similar and almost equivalent to the Chinese standard)
• KF94 (South Korean standard, similar and almost equivalent to the Chinese standard)

• KN99

Possibly from an initialism of 口罩 (Kǒuzhào, “surgical mask”) + English N95, from an initialism of Not resistant to oil particles with 95% filtration efficiency in NIOSH air filtration ratings.

KN95

1. KN95; an air particulate filtration standard requiring 95% filtration of particules sized 0.3 microns across and larger.

• GB2626-2006, the standards document setting the KN95 standard

• KN99

• English: KN95
• French: KN95
• Spanish: KN95

Borrowed from Chinese KN95, from Mandarin 口罩 (Kǒuzhào) +‎ English N95, from an initialism of Not resistant to oil particles with 95% filtration efficiency in NIOSH air filtration ratings.

KN95 m (uncountable)

1. KN95; an air particulate filtration standard requiring 95% filtration of particules sized 0.3 microns across and larger

• KN99

Borrowed from Chinese KN95, from Mandarin 口罩 (Kǒuzhào) +‎ English N95, from an initialism of Not resistant to oil particles with 95% filtration efficiency in NIOSH air filtration ratings.

KN95 m (uncountable)

1. KN95; an air particulate filtration standard requiring 95% filtration of particules sized 0.3 microns across and larger