We have a unique patio area under roof with a concrete pad.  We use a plastic grid to keep the flooring dry as their is a channel to drain rainwater without soaking the carpeting.  The problem is that it is 9.5 x 13.5 ft area.  Finding a rug with those dimensions is easy and hard.  Their are not many which fit the situation but Nourison not only had our size, it is colorful and beautiful as well.  The only problem is that when the rug arrived, it was actually about 6 inches larger in both directions, giving me cause about having a soaked rug.  After several downpours, I was pleased to see that 1.  The rug dried quickly where it had gotten wet, and; 2.  The rug did not 'wick' water from the edges further into the rug.