The 13 x 9.75 x 1.25" PolyEnvelope with String and Button Closure from Itoya is a multi-purpose archival envelope for school, hobby, office, and home use. The envelope will store and protect digital prints, photographic prints, and general documents up to letter size, and the gusset, which can accommodate materials up to 1.25" in thickness, is expandable. At the top, a flap folds over the envelope and closes it by wrapping the string around the button, which keeps the contents secure inside.
Stronger than paper envelopes, this envelope's durable polypropylene construction and the heat-welded seams make it moisture-, stain-, and tear-resistant. Because the polypropylene is also acid-, lignin-, and PVC-free, contents can be stored for long periods of time, and if the envelope is taken out of storage, the contents can be easily identified through the clear plastic.