PlayStation Vita Protective Film (Two Pack)
Like the other guy said, it's a screen protector. It does its job to prevent scratches and whatnot. I'm disappointed thought cause when I got it and put it on, and there was air bubbles all over the screen. I tried to use a credit card or something to make them come out but there was still many left. This could be a lot better.
Prevents scratches.. What else do you want?
Like all screen protectors, it can be a little tricky to get on. You'll definitely want to apply it in a very clean room to prevent any tiny specs of dust from getting under it (if you're OCD like me). Does have a cutout guide to help you position it on the screen before actually applying it, which is somewhat useful. Use a credit card to smooth it out across to prevent air bubbles.
Overall, once it's on it does protect the screen pretty well from scratches. Doesn't prevent fingerprints, but it does cut down on smudges more than the normal screen does. Having two in a pack is good if you botch the first application like I did!