Itoya PolyZip Art & Photo Envelope 13x19 AZ-13-19 Quickly and easily slide the innovative zip closure to effortlessly open and close the PolyZip Envelope PolyZip Envelope design protects your materials from the elements, forming a dust and water-resistant seal unmatched by traditional paper and poly envelopes Envelope will fit 13x19 object. Sold in singles Archival and photo safe