Have 2 masks ordered because there are very many and some really shit reviews I have me already because I had it with PRIME 24 Delivering .. (shit carnival) alone for this decisiveness Anyway, one had to open the package already on Gummy broken you need to be part of it at all to pull over it! The 2nd mask held out as much as 10 minutes, then I already had to throw away because the small Stiropor has dropped. Then I have to say is sweating in the mask like a pig. I breathe not difficult to work but after 5 minutes so much so that I even ran the broth in the eye! Would not that be enough ?, NO! something cut the processing of the masks of misserabel as would be the 10 per mask in a beggar better off.