The certificates that you want to put in the rear-mounted zipper, one has twice the length to fold because they do not fit otherwise. The zipper is very valuable and also hakelt not. The only drawback is that hiding the money is not easy blind aufzukriegen, so you may even have to go somewhere where no one sees a to arrive at his property. That is also logical, because if someone sees a pull in money, he knows the hiding place and could act accordingly.
Otherwise, he is a very good invention and who does not like Bauchgurte under which you sweat, or are even seen yet, get me a strong buy recommendation!