N-95 respirators (also commonly called N-95 “masks”) protect people from harmful particulates, bacteria, and viruses in the air. , laboratory personnel, construction workers, and others use these respirators in many hazardous situations. They come in many styles and sizes.
The picture here shows a 3M 1860 (regular size), and a 3M 1870. All respirators require fit testing to check for proper fit and size. There is no way to tell if the respirator fits properly without a fit test conducted by a trained professional. Any amount of facial hair can break the seal on the respirator and does not allow it to work properly.
Properly fitted and worn N-95s restrict airflow into the lungs, and increase the amount of carbon dioxide inhaled. Respirators can be dangerous for people with certain medical conditions to wear