As you can see from the filtration data, Well Before masks offer good production, so why did it fail the KN95 standard?
Because an important part of the KN95 standard requires that the mask have breathability that falls below 250 pa, and have both the manufacturer name and the standard to which the mask is adhering, in this case GB 2626-2019, written across the front of the mask.
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Why did this mask fail?
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1 comment
I have been wearing this mask in black for quite a while. Can you tell me why it failed (I can see breathability is not what you like), although I have no issues with it.
Can you recommend another in this style that does pass.
Sally Sutton
January 11, 2022