Great for interoffice communication, the envelopes make it easy to pass documents between individuals without damaging the pages inside. The translucent cover allows the contents to be viewed from the outside so the envelope can easily be identified. Side loading Poly XL Reusable Envelopes are made from acid-free polypropylene that won't transfer ink and copies won't stick to it. The hook and loop closure keeps 8-1/2 x 11 inch documents secure. Assorted colors include blue, aqua, purple, pink, smoke, and clear.