This is the second identical pair I have bought. They are very comfortable for walking, at least for my feet. You need to wear them for a little while over a few days until they take the shape of your foot. They can be washed in the washing machine at 40 degrees for internal cleanliness. Externally, they are easily cleaned with a damp cloth. But don't overdo it. As for the size, I normally wear 39 but in this shoe, 40 fits me.

Quite comfortable and convenient.. But in combination with Scholl insoles, it did a much better job...
The insoles and even a simple cheap sports shoe do a good job. But I would choose this one again because it is easy to clean compared to others and it is almost waterproof... However, it slips a lot on tiles.