These slippers are extremely comfortable. They can be worn outside as shoes too since they have the nice rubber bottom which has very good traction as well.  They run true to size.  I originally went by other reviews and ordered a size up, and I was swimming in them, so I returned for my normal size, and they fit perfect. I'm guessing maybe the older version ran small, but the new ones do not. Also the newer version does not have the dog print on the inside of the shoe. The insides are very nicely padded though and will keep you very comfortable and warm. I would definitely buy these again!