I love my new Cushe Slippers.  They are so light, yet offer good support for my feet.  I wear them without socks.  They also run a little small so order an extra size. I wear mine barefooted.  I normally wear a 10 1/2 US, I ordered an 11 US and they fit my foot perfect as long as I don't wear socks.  If you are going to wear socks I suggest you go up one full size.