The WWDOLL KN95 Foldable 95% PFE Protective Mask failed because the KN95 standard requires that the mask have the manufacturer’s name and the appropriate technical standard, typically either "GB 2626-2019" or GB-2626-2006,” written across the front of the mask. This is similar to how official N95 masks display NIOSH approval numbers. This mask did not have the required identification on its front.
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Why did this mask fail?
Country of Origin
Mine have the GB2626-2019 on them. I don’t think I have ever received any without that.