KN95

noun3

1. •
   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.
2. •
   Ellipsis of KN95 filter, a filter implementing the standard.
3. •
   Ellipsis of KN95 mask, a face mask using a filter conforming to the standard.

   • 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. — 2022