The zip is of very poor quality. The material around the zip stretches, which makes it difficult to do 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 at weekends and during trips. At this price, a sturdier zip could have been used — after all, this is the Military version, and it couldn’t even cope with everyday use in the city and one trip.