The best, but. . . . .
"I really like the backpack; it is very practical and easy to pack. The only issue I have with it is that the valve does not hold the vacuum properly, so I cannot compress my clothes effectively. The valve has been continuously leaking since the very first use. I contacted customer service about the issue, but unfortunately nothing was done. They only suggested that I rearrange the clothes inside the backpack. I followed their advice and even tried packing fewer clothes, but unfortunately the problem remains exactly the same. It seems that the valve itself is faulty, and I don't know what else I can do about it. Unfortunately, the warranty has already expired. I really like the backpack otherwise, but without a properly functioning vacuum valve, I cannot use one of its main features. I am not sure what the solution could be in this situation."