The slipper are very cozy and warm . My husband bought them for me for as my birthday present, as the sheepskin in my older Ugg slippers was wearing out. My husband had surgery recently and mentioned his feet were cold. I had him wear my new Cozy II slippers. From that time on he would wear them as often as he could. To solve that problem I bought him a pair of Cozy II slippers. They tend to run somewhat big, so a size 11 fit him great. Now we both have warm feet morning and night. In fact, I am going to buy two more pairs to keep at our home in the desert. The only problem with the Cozy II slippers is that the sole is extremely hard and does not provide cushion. Also I wish Ugg would not put their label on the heel. It would be much more comfortable to have just sheepskin and a softer sole. Thanks Zappos for your great service.