These are the most comfortable slippers/booties I have ever owned. I love the thick cushioning of the footbed and the plushness surrounding my ankles is super soft. They also keep my feet warm, which is a bonus. Wonderful product! BTW: I'm a size 8 and the M (7-8) just barely fit the first time I tried them on, but I loved them so much I kept them and within just a few days of wearing them, they stretched to fit my feet perfectly.