The project author first collected tones of basic plastic bags that are given away by shops of all kind, and she literally created a material by heating them in layers with a pressing iron. Then she created with this new material all sorts of bags, sleeves and cases simply by sewing it with a green thread giving it a nice trendy «green» look.
Reference:
http://packaginguqam.blogspot.com/2009/07/extra-baggage-amanda-mocci.html