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. Poly XL Reusable Envelopes with a hook and loop closure are made from acid-free polypropylene. For 8-1/2 x 11 document storage. Holds up to 150 sheets. Side loading. Assorted colors include green, orange, purple, turquoise and yellow. Each pack includes 10 envelopes. Sold as 2 packs for a total of 20 envelopes. Recommended age 3+ years