Think of this bag as your truck bed, just throw your stuff in it and go! Already using a great backpack? Just drop it in the Haul-It and take the load off your back. Arkel's Haul-It will carry your backpack, briefcase, gym bag, grocery bag or even a case of your favorite beer! Arkel designed a compression strap that is a one pull and click system that compresses 3 ways! It's collapsable/foldable so it can easily be stored and carried off the bike when empty; it also features a zippered convenience pocket for keys, wallet or phone.