My daughter gave me a pair of these 5 years ago for my birthday.  We have a lot of sub-zero temperatures here and I have to admit I don't just wear them indoors, sometimes I run out to get things from the car in the ice and snow and just slip these on rather than put on shoes.  I love them so much I gave my brother a pair for his birthday.  He sleeps in his and no longer has cold feet.  I have worn mine almost every day and they're finally in tatters and now I have to buy my own pair.  Definitely going with the same ones.  Worth every penny and more!