The shoes are in the sitting / lying very pleasant and nice and warm. Running is a bit strange, as on sand, but you want to order, too complete a marathon. However, one could divide the sole into chambers, then the content would not slide around. Those like me who is with shoe size 40 at the end of the size range, should better choose one size larger. The inseam of the shoe presses for some time but quite unpleasant on your toes. Conclusion: I would buy the shoes at any time, but just one size larger :-) The price / performance ratio is good.