The vest was used twice.

Attention: I recommend checking the measurements on the website.

I thought it would be elastic enough.
Anyone who, like me, does not have an extremely slim runner's build (due to strength training, a somewhat broader back), should definitely check.

My flasks didn't fit because the vest is too tight. Especially those who plan to cover longer distances with it should pay attention. Because you might take a rain jacket, phone, etc. along.

Poles can be attached at the back.

Otherwise, everything can be seen in the photos.