I don't mind what it is, I just want the game and goodies inside! :drool:

Just look at the screenshot people: http://fallout.gamesas.com/images/topstory/fnv_ce-generic.jpg
I really dont think you could get that look from metal...we're just spending too much time comparing it to the FO3 CE.
As I said before: its probably a nice cardboard. and, looking at it more, possibly some kind of cloth covering that's been artificially warn.