Itoya Art Profolio® brand PolyZip® Envelopes are a great way to organize and store your art and photography. They are made from durable polypropylene and are archival safe for long term storage. Featuring an easy to use zip closure, Art Profolio PolyZip Envelopes seal out the elements to help resist dust and moisture. An expanding 1-1/4" gusset provides flexible storage for a single photo or a stack of artwork or photographs. These convenient envelopes are also good for carrying art supplies and materials. Art Profolio PolyZip Envelopes also feature a single sheet pocket in the front for a routing slip or a content sample.