At first I thought the hard shell material anmutet little as leather would still stretch. That did it. The foot was still not comfortable canceled. This is mainly for two reasons: The slipper is not in the least breathable. The feet sweat. That would almost have to get over. But the missing footbed and tight topcoat weigh you down so that it even comes to overloading of the midfoot. Pity about the purchase. Is for a ton.