The Coolaroo Coolhaven Shade Sail is the perfect permanent or semi-permanent shade solution for your backyard, deck, patio or spa. it is breathable to allow warm air to escape through it, substantially reducing the temperatures below. The fabric is highly durable, easy to maintain, and resistant to mold, mildew, stains, tears, cracks, and fading. It is also very easy to clean u just use a mild detergent (if needed), hose off and air-dry. This triangular shade sail is 18 feet on each side, so it will provide plenty of protection wherever you need it. It comes with pre-installed, rugged stainless steel "D" rings at each corner to make installation even easier. Install multiple sizes and colors to elevate the design of your space even more!