This is a simple and basic design, available from many companies.  But, I really like this one.  It seems well made and is attractive.  But, most of all it is comfortable for my cats.  They really love using it!  From one to four cats is on it at any given time, as they pile onto it together. I am not sure why it is so special for them, but I already bought a "back up" for when they ruin this one!  There have been a couple of vomiting issues from the lazy ones already, and it spot cleaned real well.  So, I would highly recommend this bed.