Quickly and easily slide the innovative zip closure to effortlessly open and close the PolyZip Envelope. The design protects your materials from the elements, forming a dust- and water-resistant seal unmatched by traditional paper and poly envelopes. The clear front pocket allows for a separate area to secure a cover sheet or routing slip. Ideal for carrying documents, reports, presentations and catalogs. Perfect for storing and organizing as well. Archival Safe.