I have the same complaint as most other reviewers. I purchased the backpack for my son who just started fourth grade. In previous years, I had purchased the L. L. Bean rolling pack and it usually lasted for the entire school year. The L. L. Bean backpacks are expensive however, so I decided to try this more affordable model this year. I guess you do get what you pay for. I saved $30 by purchasing the CalPak, but now I need to invest in a new backpack so, ultimately, it will cost me more money in the end. I would like to point out that my son doesn't carry any books back and forth (they all stay at school) and the only things that go in are his lunchbox and the book he brings for silent reading. We used to put a water bottle in the side pockets, but those tore up first a couple of weeks ago. Very disappointed in this product. Too bad because the backpack looks very attractive and my son loved it.