NGP stands for Next Generation Polymer, referring to the kind of semi-rigid TPU-like material it is made from. Unlike rubber, the case is rather sturdy, though it does have some give. Unlike many flexible shells, it does not accidentally pull away from the sides of the screen with a light touch; once it’s wrapped around the body of the iPad mini, it stays in place until you want it to come off. We found the openings along the edges to be just shy of off-center. They’re not far enough to obscure access to the ports or block the speakers, though. The case protects the Sleep/Wake and volume buttons too, although you must apply some extra pressure to press them. This isn’t terribly surprising considering NGP shipped before the iPad mini itself, but it could be improved. Additionally, although there’s no screen coverage, the case forms a small raised lip around the perimeter of the bezel. It isn’t uncomfortable when holding the iPad mini, and provides a little protection if the mini drops on its face to the floor.