Let people know about upcoming events Designed for wedding invitations, greeting cards, holiday cards and more. Acid-free paper resists yellowing and fading. Moisture-activated gummed closure creates a secure seal to help keep contents safe. Made of 28-lb kraft paper. Greener choice - contains 100% postconsumer recycled content. JAM Paper (R) Booklet Invitation Envelopes, A6, 4 3/4in. x 6 1/2in., 100% Recycled, Brown, Pack Of 25 is one of many Lined & Invitation Envelopes available through Office Depot. Made by JAM.