My friend, Jess had one. He shot it point blank 5 times to test it..
Just dented it, and the dent forms back out in 2 minutes or so. And hell, get it if you get it free and test it.. and always have it for a backup. I don't have a full mask as a backup, because I'm a moron! I have 2 pair of glasses on me, most of the time, but that's it.