N95

noun3

1. •
   N95; Ellipsis of NIOSH N95.
2. •
   The N95 standard.
3. •
   An N95 filter.

   • 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