This Backpack/Dry Bag goes against the traditional dry bags by offering a large 30-liter storage capacity to protect your essential gear. We added a padded back and padded straps for comfortability, along with durable buckles and adjustable straps. The backpack features a zipper storage pocket on the back for easy access. The overall size is 13" x 7" x 25". We love using the backpack on our hiking and camping trips as we haven't found an easier water resistant solution to carry our clothes and research gear.