An attractive rug, but -- after a year or so -- a clump of rug material about the size of a silver dollar just disappeared.  The white mesh sub-layer was visible.  It was in a very low-traffic area, and there had been no spills there.  Just for your information, there was a small black spot/flaw in a high-traffic area.  We just lived with that small matter.  We replaced it with a new Wayfair rug, from a different manufacturer, this month.