meets exactly its purpose

The backpack has little weight. But I think he's stable enough. Uprooted so far nothing. One gets his things for short trips under loose. 1 pair of shoes, an umbrella weight, pants and other clothes could be stowed away easily, I had not even reaches 4 kg. Check as hand luggage was at least at Lufthansa no problem, there were no complaints, in the luggage compartment of the aircraft to let the backpack stow easily. Wearing the back was at least over short distances (parking garage to the departure gate) easily, it expressed nothing.
For the price of the backpack exactly does the job.