You can not complain about the quality of the backpack for the money. Only 50 liters are a bit exaggerated, I guess the actual volume amounts to between 40 and 45 liters. The main compartment is divided into two zones, the lower zone can also reach out. The two zones can be Connected to a great you are only separated by a wall of fabric einnader without problems. The comfort is ok, I have been three days on the Zugspitze go and had no problems, all seams and Reisverschlüße have held. For the money you can not expect the value for money is top.