I wanted some slipper socks that would keep my ankles warm as well as my feet, and these do just that! They are very very soft inside. I wish they were a little thicker and warmer (it's very cold where I live now!), so sometimes I wear socks inside them. I wear an 8 1/2 shoe, and they are plenty big for my feet. The color is black, as stated, not grey, as pictured. I have not washed them yet, so cannot comment on how well they hold up to washing.