I ordered that protective shell, because I find it very good the bacon prop brand and have never been disappointed. When the package finally arrived and I unpacked the envelope, I thought at first of a cheap imitation. The plastic also really feels like plastic and is quite "hard" I'd say, and unwieldy. The substance is not really "matter", but acts and feels like a thicker paper biliges me buffing and motif.
For the money I found this envelope but then also iwie too expensive, unfortunately, absolutely not true price performance ratio.