Safeguard important documents! When you can’t or shouldn’t fold the contents, document envelopes are the professional solution to sending flat but bulky materials – pamphlets, brochures, sales literature, booklets, annual reports, magazines or catalogs. Open on the long side for easy paper insertion, these envelopes are substantially thick for durability. The Zip Stick® self-adhesive flap measures 3-inches and helps to protect documents in transit. Available in various sizes, each with outside side seams.