Bought this to cover an outdoor deck. Its BIG!... almost 18ft square. Used it all summer and just pulled it down because we are only in the low 90's high 80's during October, lol... Nothing like 81 degrees before the sun comes up in October down here in Mexico.
Super heavy, high quality piece. I would recommend judging the size very carefully as this one stretched a few inches after some rain, wind and 108+ degree weather for a few months. I measured just short of the opening I wanted to cover and will have it taken in a few inches before I put it back up. It comes with TWO adjustable hooks (whatever they are called)... I would get two more so you can finely tune each corner. The tighter the better when it comes to this sail, make your measurements count.