Got theses because they were on sale. I usually get sheepskin but thought i would give these a try. What a wonderful surprise! My feet are warm,(Colorado winters are cold) they don't sweat, and unlike sheepskin-that tends to flatten out so the slippers begin to 'slip' off my feet- these hold their shape. And the bit of memory foam in the sole is great. I only gave them four stars because now Acorn will have to improve on an already great product! That's my challange... but- do buy these!