The real stress test was then carried out in the 2 weeks of my Florida holiday where I wore the camera 10 hours a day with the wrist strap.
After 2 days I got a rash on the back at the point where the loop rests (supposedly genuine leather).
At the bottom, where the strap is threaded under the camera, has - probably due to the temperatures around 35 ° C - dissolved the glue with which the rubber pad is glued. The result is that the top of the foot and the bottom of the camera were sticky, and it took me a while, at least back to get the camera adhesive residue free. I no longer have to walk so far to get tack-free, since the adhesive is no longer fixed, but still 'nachquillt' out of the cracks.
Conclusion: The idea of the wrist strap is great, but the materials used are not ideally chosen.