The sizing runs true. These are extremely comfortable. They keep your feet warm and cozy. The bottom is the type of surface that can be used outdoors if the occasion comes along. It is winter as I write this and I use them to walk out to my garage in the cold. Well worth the money.
Got them on Zappos (no Prime delivery for them here). They are very comfortable. Not too hot, not too cold. Perfect for times when stove pipe Uggs are too much. The sole is just right a little thickness for going outside but no too thick to make it feel like a shoe. For the first couple of weeks they leave little black fur balls on the floor when you take your feet out.