The Prestige Alvin Art Envelope 12 X 16 - Pkg of 6 serves as a protective barrier against dirt, dust, and moisture that can damage important documents and treasured artwork. Measuring 12" x 16", this protective sleeve made out of heavy-duty clear vinyl has three heat sealed sides to prevent documents from slipping and sliding out of the envelope. The fourth side features an easy-open flap that keeps documents protected against harmful outside elements, but allows for quick and easy access to stored paperwork, artwork, or documents. Each envelope comes with an acid-free paper insert that provides a stylish boarder for stored documents and artwork without potentially damaging any ink or printing on the paper. One six-pack package comes with six individual envelopes and acid-free paper inserts.