INVALUABLE RESOURCE – These non-adhesive manila library pockets are a must-have for every classroom.  Teachers and librarians use them for library management, storing flashcards, attendance charts and more! USE FOR ARTS & CRAFTS – Anyone that is into arts and crafts will love the manila library pockets.  Use the pocket envelopes to make unique wedding or birthday invitations.  Draw, color or paint to create fun designs! DESIGNED TO LAST – The manila library pockets have a deep, low back and are made from heavyweight manila index card stock that is acid free and fade resistant.  This will help prevent the miniature envelopes from fading or wearing down easily.