I was first with the value for money compared to other comparable backpacks more than satisfied. Unfortunately, I can throw away almost daily use to work for 8 months him now, probably because certain materials are not as high. It started about 2 months ago that one did not work from the 2 main zippers and now yesterday also went the other broken, So to have an absolute Schwachstelle.Einen new zipper sewn into the bag would probably exceed the value. A little, mocking customer Frank S.