Gonna guess the media is the stuff you use for wrapping display booths etc, sort of banner material. Can't remember the name, but there are products designed for wrapping large, odd-shaped objects. Or the stuff used to apply graphics to the rounded surfaces of vehicles. Most of those are solvent based, I think. Somebody will know. Just looking at the corner folds suggests it's something more than just wet paper.
When I go into Piedmont Plastics to buy Gator, they try to sell me stuff like this...http://www.signsupply.com/Media/3M/8518.asphttp://www.dreamscapedirect.com/index.html
edit...this and other vinyl products may be more in the ballpark...http://ijtechnologies.com/index.php?target=categories&category_id=193