It's out of plastic and as featured in the reviews completely unusable because dust will stick on the barely covered edges. I would advise you to look for another screen protector because this is definitely a no deal.

Plastic sheet (x2) definitely ! And with some research is appears that the glass one (many models available) is not yet a good deal : most of them don't stick right, and prohibit the use of a case (curved borders : case OR curved glass cover, not both "yet")

I don't think so. More likely plastic