ADJUSTABLE ELASTIC STRAP: Use the fully removeable and adjustable hook and loop elastic strap to securely attach to your Bound Book. USE AS POUCH: Works as a standalone instrument pouch when book strap is removed or not used. CARD POCKETS: Two exterior card pockets securely hold cards for quick accessibility. WRITING SLOTS: Flexible organizer on the exterior provides space for 3 writing instruments. AMPLE POUCH: Large interior pocket for phones, chargers, and other loose accessories you want to keep dry. WEATHERPROOF ZIPPER: Tough, reliable zipper is water resistant when closed. GEAR LOOP: Connect the DirtBag Pouch to anything via the durable exterior gear loop. FITS: Any Hardcover Book from 7.5” to 8.75” in height. WATER TIGHT SHELL: Tough and flexible TPU construction holds up to any condition and years of abuse.