N95 Face Mask
N95 respirators are considered functionally equivalent to certain respirators regulated under non-U.S. jurisdictions, such as FFP2 respirators of the European Union and KN95 respirators of China. However, slightly different criteria are used to certify their performance, such as the filter efficiency, test agent and flow rate, and permissible pressure drop.
The N95 mask requires a fine mesh of synthetic polymer fibers, also known as non woven polypropylene fabric, which is produced through a process called melt blowing that forms the inner filtration layer that filters out hazardous particles.[