Not as advertised!
Bought these and didn't want them anymore. Plus it took several weeks for it to arrive. I work in the medical field and had high hopes that this was legit (also didn't read the reviews like a genius) and got them anyways as a mask to wear under the one I have. I reached out to the seller to process the return, turns out it would cost more to mail it back to China where it came from and that was without insurance. Not worth the hassle.
Rating: 1 stars