There are several good reasons, all are protective to the wearer:
KN95 is the Chinese certification standard, N95 the US standard.
The Federal Drug Administration and Centers for Disease Control have both approved the use of KN95 masks in the cases of N95 shortages, but appearances aside, there are two major differences between the masks: First, the American-manufactured N95 masks can withstand a slightly stronger pressure as the person wearing it inhales and exhales, according to infectious diseases specialist Dr. Michael Rajni “Fit is of maximal importance,” Rajnik told the Herald, but said KN95s were “adequately equipped” for doctors and physicians if they are produced by legitimate medical manufacturers like 3M. KN95 is the Chinese standard, N95 the US. Also, the KN95 mask are designed to fit differently than the N95s.
There are two ways, both are good. You are looking for a snug fit for best function, and appearance.
Size by Body Weight
Eye-Chin Distance Measurement
|Size||Eye-Chin Distance (inches)
|XS:||Less than 3.3"
|S:||3.4 - 4.1"
|M:||4.2 - 4.6"
|L:||More than 4.7"
Since the product is not returnable once the box is opened, please take the time to order the right size.
The Airinum mask skin is coated with a Polygiene coating which can sustain repeated gentle washes (without the filter and the exhale covers). We recommend hand-washing in mild detergent and air drying.