I have poor circulation in my feet and hands due to a medical disorder.  I wear socks year round and 2 pairs in the winter.  I absolutely love these slippers and they are very warm.  I especially love the rubberized soles so that I can venture outside in the frost to feed my doggies and then come inside and not have damp slippers that make my feet cold.  I highly recommend these slippers for anyone.  Mine ran true to size and I will definitely order another pair when these need replacing.