This is a scary looking mask, and the mouth opens when you open your mouth.  If it doesn't fit quite right, it comes with pads you can put inside to make the mouth easier to move.  My cat flipped out in fear when I put it on.  I took it off and let her check it out, thought she felt safe, and put it back on - she flipped out all over again.  In other words - good stuff.  Comes in factory packaging that might make you think it's not that great, but it is.  A very little bit of the fur shed off, but it's really good.