When I first put them on, they hurt a lot between my toes. To open them, I wet them and wore them. Indeed, that's how they opened. But as soon as they got wet, the leather on the sole started peeling off. They also slip a lot and are not suitable for walking, my feet hurt. They cost about the same as sandals of this kind, but now for just 5 euros more, you can find even orthopedic ones.