I was looking for a backpack for the university. I have to go every day 1.5 hours by train and it is quite possible to come sometimes in a rain, had to be waterproof backpack. A quick test under the tap, however, showed that this backpack is not waterproof, which is due to the lack of internal coating.
As an alternative I ordered a Dakine backpack with 25L volume, this even offered more space than this 28L backpack by Jack Wolfskin.
Positive is the beautiful color in chocolate brown and beautifully processed zippers.