This is a beautiful rug and seems to be a good quality. Poly propylene is always a safe bet for outdoor rugs so it should hold up. The price was amazing and I hope to get another one before they sell out as I have a very long patio. One item of note is that the edges, especially the inside edge that is rolled up, is taking a while to settle down so I have some weights on it right now. Hopefully that will work out before long.