Also, the upper is supposed to be leather, but it is actually synthetic (easy to tell with the smell test. Will have to see how they hold up under wear and tear of daily use. I will definitely be getting some thicker ones next time. They appear to be well constructed, but I can?t comment on how long they will last yet. So erzeugt man öfters Fehlbedienungen. PS 4 literature in box says they have BACKWARD COMPATIBILITY - but that is a "LIE". I have a wide oval shaped bar, and they still worked fine but were a little difficult to get them to not want to sit crooked. They have stayed put and are very comfortable. you want to protect your investment. By the end of every day they leave a strong black mark all over my heels and toes that I need to scrub the next morning.