I ordered 2 shade sails (I needed 5, but wanted to try the first two before I spent the money on the rest). We hung all 4 corners, got one side hooked and went to hang the opposite side. Before we could even get to the other side, the ring ripped out of the first side. We had not even begun to tighten the turnbuckles yet as we were going to do that once all sides were hooked in place. When I opened the sails and saw how lightweight the material was, I immediately questioned their durability, but just figured might have to replace them more often than I originally anticipated. However, I didn't expect them to break on the first day. Without the sides supported, what I have is a giant bowl that will fill with water and crash down immediately since they are waterproof.