KF94

noun3

1. •
   An air particulate filtration standard originating in the Republic of Korea, South Korea, which requires filtration of 94% of air particulates.

   • However, some fake masks made in China may be labeled KF94, so shoppers still need to do their homework. — 2022
2. •
   Ellipsis of KF94 filter, a filter implementing the standard.
3. •
   Ellipsis of KF94 mask, a facemask 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