From my perspective as a person who's career has been in manufacturing, from the factory floor to supply chain consultant to factory owner who lived in China fo

From my perspective as a person who's career has been in manufacturing, from the factory floor to supply chain consultant to factory owner who lived in China for 10-years, there is a distinct difference between definitions here of substandard quality and fake. If some company is trying to sell a non-3M designed and manufactured mask as a real 3M mask, that's the definition of "fake". If a company has poor manufacturing practices but is using materials which would otherwise be acceptable industry materials to make a mask to KN95 standards, but for some reason, a random sample of the lot is proven to be "Substandard" to the KN95 standards, that is the definition of "substandard".