x220T screen protector or touch layer?

[Mighty_Mauz]

I just received a used X220T (multi-touch) and it has minor scratches on the screen. My eye caught something that looks like a screen protector. I can see a little plastic edge all around the screen. But I am afraid to tear it off, and find out that it was actually the touch input and no screen protector.

So that's why I like to ask is it a screen protector, or could it be the touch layer?