They are really comfortable and what I like about them is that they are much cooler than any other kind of backpack that leaves your back soaking wet if it's really hot. These products are convenient because of their multi-functionality, their capacity, their resistance, their lightness, their easy cleaning and how little they occupy when you want to store them. And their price! We deviate: yes. They are comfortable to wear and some of them admit a lace adjustment accessory on the chest, which leaves it closer to the body, great for cycling, trekking and even running with it on.