Amazon calculates a product's star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
its not that bad it covers the face and light but that they care about it being even from both ends. if ur picky about a proper filer mask this is not what ur looking for. also i dont see the point of the carrying pouch
This product is fake, waste of money and not following the right regulations as it let the air out and in easily. I tested it against a lighter and the air goes through the mask easily. Having such a product will be against the regulations for sure.