The Pilot Pubs Bag is ideal to keep things together while you're flying. This pubs bag is handy for keeping your books together, with a sturdy velcro closure to keep things in place. This is a large book bag made of tough 600 denier nylon and measures 9 1/2 “ X 12” X 4”. Pockets on all four sides. Your books are secured inside by a flap that attaches to the bag with a hook & loop fastener.