Hi Miguel. I work for Kühl am writing to answer your question. Your pair of pants with the weak snap has indeed been updated. We had Fiochi, the Italian maker of our snap, re-engineer the snap for us with an improved, stronger spring. The new spring and snap design by Fiocchi takes care of the issue you mention. (contact us at firstname.lastname@example.org for a repair/replacement. Simply describe your issue to one of our representatives.) Hope this helps. Thanks for admiring our materials and designs.
BTW: Want to know why we use a Fiochi snap? Our snaps are designed to lay flat and not "dig" into your waist (think of the typical jean button fly with its rivet-stem-button.) When you wear a belt or a backpack with a belt, the Fiochi flat snap will prove itself to you! Cheers~ Kühl Social Media