How Masks Work Against Virus Sized Particles less than .03 Microns
Droplets produces by humans by coughing and sneezing range in size from 0.5 microns to 10 microns. Mask and respirators are usually rated according to their efficiency at filtering 0.3 microns particles.
Regular surgical masks are loose fitting, covering the nose and mouth, whereas filtering facepiece respirators (FFRs) are tight fitting masks and are designed to create a facial seal.
Respirators with high efficiency at 0.3 micron particle size (N95/KN95/FFP2 or higher rating) can filter particles down to the size of the coronavirus, which ranges between 0.06 and 0.14 microns in size.
Here is why:
High filter efficiency at 0.3 micron size also results in high filter efficiency below this size also due to Brownian motion: The particle’s mass is small enough that it no longer travels in a straight line through the air. It interacts with air molecules and moving in an erratic pattern that allows it to become embedded in.
Due to Brownian motion, N95/KN95/FFP2 rated filtering facepiece respirator masks are able to capture more than 90% of tiny 0.01 micron particles (10 times smaller than the Coronavirus), and regular surgical masks can capture more than 60% of these particles.
4-layer Purification: Melt-blown non-woven, extreme particle absorption, double layered electrostatic filter, and highly efficient at filtering particles.
Breath with Ease: Advanced non-woven fabric provides easier breathing.
Ergonomic Design: comfortable to wear, low impedance filter material.
Securely Sealed: Adjustable metal strip ensures optimal sealing between the bridge of the nose and the mask.