I bought this backpack to compare it with the Wisport Zipperfox 42. On the plus side, I can count its expandability options, especially the zippers for quick attachment of a module in the AVS standard. I also like the use of plastic plates in the shoulder straps, which will definitely improve comfort during prolonged carrying of a heavily loaded backpack, while at the same time allowing the use of thinner cushioning foam, and therefore foam that is less prone to overheating. The build quality seems to be at an appropriate level, and the number and placement of the bar-tack seams suggest that the backpack should withstand at least several years of use. The capacity meets expectations. The main compartment can fit a winter sleeping bag (Carinthia Brenta or equivalent), but not much more. On the downside, I have to mention the back-stiffening plate, which, alongside three aluminum stays, forms part of the frame. This plate cannot be removed because it is sewn in, which will significantly hinder or even make it impossible to wash a backpack that is supposedly designed to be dragged through the field, and its curved (~) profile may not necessarily suit the user’s anatomy. The second downside concerns the quick-release buckles that allow the backpack to be dropped in an emergency. While this is an interesting intermediate solution between a ROC buckle and a Fastex, they... creak under load. It is not a sound that I would describe as posing a danger, considering the typical sounds associated with moving through a forest, however, this sound turned out to be irritating enough after just a two-hour trip to a relatively quiet forest as part of backpack testing that it earned its place in the above review. Another drawback in the context of the design assumptions is that, unlike Wisport, Direct Action (Helikon) manufactures its backpacks in Vietnam.