I was not a fan of mule slippers until I saw these. I have the "sister” pair, a true bootie with a higher backing, also purchased from Walmart. If the booties were comfortable, then the slippers must be, right? Right! These are the comfiest slippers ever! The insides are very soft and after a few months wear, it has not become matted. The heel is a bit higher than a true mule, which gives me a secure fit as I walk around. I wear a size 6 and they fit perfectly, even with winter sox. The only negSee full review