I have it for 5-6 months, almost daily use. The clasp indeed seems loose, you can easily open and close it, but with an ffp2 mask inside, it never opens on its own, if you put something bulkier it might. I have bought a similar one from a different brand at the supermarket with a hard clasp, but it is difficult to open, I don't see the reason. Also, I really like the pale green color, it is discreet.