Class Case Vintage 80s BIG Pockets clear plastic side-opening folder for 3-ring binders with velcro latches

"Holds calculators, floppy disks, pens, pencils, protractors, rulers, 3x5 cards, reports, special papers and more! Holds contents securely with side flap and velcro closure. Fits all standard three-ring binders. Made in the U.S.A." -ClassCase

Product Review; " Wow I couldn't find a single seller or previous listing or even a mention on a company-history archive (besides the picture above) - it seems "Class Case" was only a very small incorporation (if even an LLC or "reserved entity") and made these storage envelopes for standard three ring binders during the 80s. I'm not sure if Class Case made any other variations, but the one pictured here has a really functional and convenient design - the velcro-enclosing pouch opens on the wider side, giving you easier access to contents, as well as making it so (if you're using a latching binder) the binder itself helps to hold the pocket closed as well (as opposed to the top-opening style, where the binder provides no support to the pocket opening). I wish I could find more about this great vintage product (although there are imported duplicates of this design) this really was a solid useful addition to any school, office, or personal document binder that just insn't made here anymore ! " -MadeInUSAReview