Before a good quarter I bought my first pair of Chung Shi Dux. I've been doing for almost a year achillodynia, and now came the diagnosis even heel spurs added. Not pure pleasure. Since the prescribed orthotics in slippers or clogs usually do not work, I have come to these shoes for a little internet research. And have to say, awesome! No pain when running, while breezy and not plastic odor still plastic feeling. And that easily incorporated footbed supports my slight kink-flat feet quite well. Only the secret with the sizes I have not yet aired. I usually wear a size 41, rarely times 42. Some write here that you prefer the Dux should order one size larger; I have ordered them therefore in 41/42 (Khaki). The next pair I would rather a small number, so 40, order. One more note on the side: As Badeschuh the Dux in my experience not so good, because you slip so easily on moist soils, and then also has no good hold it; In addition, they squeak on a wet surface heartbreaking.
Addendum: Obviously "shrink" these types of foam shoes when heated. I also let the shoes lately (hot August) times to stand outside on the terrace. A short time later they had become loose one size smaller. The same is happening to me, incidentally, also with a pair Waldies Aruba. So: great and super comfortable shoes, but in the blazing sun must not leave them to. That is why I am now times away the fifth star.