I'm not sure what they are made of, but they are so soft. You can tell just by looking at them that they are going to be warm and boy are they ever. The bottoms don't mark up my floor (I have wood flooring) and they don't catch on the carpets either.
I'm not sure I've ever had a pair of slippers that are this comfortable or soft. I don't like to wear shoes at all if I can get away with it, and this will help with that in the winter time to keep my feet warm while feeling bare foot at the same time. I'm really looking forward to the colder weather now.
You can get your own pair here on Amazon.
All in all these slippers are a good value for the money and the stitching seems strong so hopefully they will last for a while. I really like them.
Have a great day!