Memory foam? I don't think so...

Initially, these were the most comfortable slippers I've owned. However, after five days of use, the so-called 'memory foam' insoles are now flat and hard. If these slippers were made with real memory foam I suspect the insoles would have remained soft and cushy for at least a couple of months. But five days? Not good. The main positive is that the upper part of the slipper that covers the foot remains comfortable. For buyers purchasing these slippers online, I agree with other reviewers that they run a bit small. I wear a 10.5 shoe but needed the 11-12 size for a comfortable fit.