Received deck sail, appears a woven vinyl and looks pretty sturdy. The one I have 16'x16' and sewn edges and metal rings sewn into each corner. Since it is vinyl and not fabric I believe it will be good during a rainy day. I have a lot of points trees in my back yard and I always have a mess if pine needles on my deck, my hope is that this will help with that.  I have our photographed unassembled as hardware is not included with the sail and I have ordered it but not received yet. I think this is a good shade application.