The zipper is very poor quality. The material around the zipper stretches, which makes it difficult to zip up, and then a hole appears. Together with my friends, we bought three identical backpacks, and the same problem occurred in every one of them. Mine will probably soon become unusable, even though I’ve only had it for 3.5 months and I use it only on weekends and during trips. At this price, a sturdier zipper could have been used — after all, this is the Military version, and it couldn’t even handle everyday use in the city and one trip.