LION Design-R-Line includes this 13" x 9-3/8" size, blue plastic envelope with Velcro type (hook and loop) closure. Sleek style document envelope is designed without gussets to save filing space, yet can hold up to 180 sheets or entire letter size manila folders. Hook-and-loop closure allows quick and easy access to contents. For clear view of contents, this transparent envelope will work perfectly. Organize your documents in this convenient & roomy letter size (A4 size) envelope. You can reduce the amount of fading in photos, artworks & documents by shielding them in this acid free envelope. Your contents will not transfer toner or stick to these envelopes, made from archival safe polypropylene. Recyclable envelopes.