I had to return this backpack because of the overwhelming unpleasant odor. The backpack arrived yesterday and the odor was immediately noticed by my sister and me. I opened the box in another room and a few minutes later, my sister inquires about a strange smell. I placed it in the garage overnight and the entire garage was reeking in the morning. I must honestly say that I have never experienced such a thing. Even if the odor did not exist, I expected more pockets and storage for smaller items. The roller system appeared to be well constructed, but unfortunately I'll never experience it.