Is a very practical backpack. For long walks but it's so that the carrying Schulder suffers a bit, but overall the straps are very comfortable. Ins upper compartment I always squeeze a few 0,3er water bottles and granola bar - more is not there. The closures are large and stable and the zipper goes smoothly. There are many small pockets and nets for accessories. When cycling I have the rucksack also every now and then.