I live in these slippers when Im home. I think they are magical and help me to be more productive! :) They are grippy enough to help me run up and down the wood stairs without slipping. I don't like to carry my baby up/down our steep wood stairs in socks or other slippers and these are perfect and I love them. They are comfy and fit just right. I normally wear an 8 shoe size and bought the medium, but Im at the max that I would suggest for the medium, but the large is too big for me.