Omg...this is the most comfortable slipper I have ever owned.  My feet are warm yet not hot and sweaty.  They support your foot but feel like your on an elevated pillow.  Love the elastic fabric on the heel, smart whomever thought about that.  I have a size 8-9, although my shoe size is 9.5 t 10.  These fit perfect.  Like the Velcro across the top too, adjustable for those that have a high instep.  Order these, you won't be sorry they are worth every penny!