Great slipper except . . . I normally buy sheep wool lined slippers.  But this one has some sort of coating on the wool that made the bottoms of my feet feel like they were burning.  I'd take the slippers off and the feeling would go away.  After several weeks of use now, that situation has stopped. I don't know if my foot perspiration "washed" out any chemical that was on the wool or what happened.  On the good side, the wool doesn't seem to get matted down and "clumped" from foot perspiration and toe movement like others I've gotten from Cabela's who use 100% sheep's wool. Tamarac uses a 80/20% blend for its' lining and not 100% wool.