Had this for a while now and was a bit sceptical leaving it outside, but after a wet, humid summer it looks and feels as good as it did when I first put it down. In addition, a lot of new construction was happening all around me and there was plenty of dirt in the air.  As recommended, running a vacuum over the rug works wonders and is very easy to clean.  It took a few days to dry in the humidity, but that was to be expected.  Very happy with the rug and it really picks up the screened in patio.  My wife and I were very pleased with this purchase.