I have bought these shoes for 1 month now and from the very first day I noticed that the sole wears down very easily, as if it were an eraser. As if that weren't enough, it also leaves black marks when I walk on shiny tiles and I am forced to clean them constantly. This happens especially at my job and I keep getting remarks about these lines that the shoes leave behind. I was very disappointed by the quality of the material, given that these are not cheap shoes. If I had known, I would not have bought them.