Manuela Fellner, singer and Swiss Grand Prix champion, Switzerland

I can tell that my feet are getting a lot stronger. I have a much better feeling in my high heels, for example. Because I wear kybun shoes every day, my foot muscles have a lot more exercise than before.

Benji von Ah, Swiss Alpine wrestler from Oberwald, Switzerland

I was unfortunate to get had some knee injuries, but the kybun shoe takes the pressure off my joints and relieves them.

René Keusen, deputy head of logistics for the Cantonal Court of Zurich, Switzerland

I've already had two slipped discs. And on top of that I have trouble with my knees: I have split kneecaps, which actually isn't that unusual. Lots of people round the world have them. But it has given me a lot of gyp. I used to work in an opera house, and that was physical work. That's why I was forced to give up that job to go back into education or retrain to return to my old job. Since then, I've managed a couple of months without pain. That is, I still get exercise. I strengthen my stomach and back muscles. At first I was quite sceptical about kybun shoes, as I didn't like the way they looked. But I told myself that if they might be of benefit, I should at least try them out. Now I never want to be without them again. The feeling I have when I walk and my general wellbeing are quite different.