Coolaroo Coolhaven shade sail is a great semi-permanent or permanent shade solution for your deck, patio or spa. Its unique HDPE knitted fabric blocks up to 95% of the sun's harmful UV rays, and is breathable to allow warm air to escape through, substantially reducing the temperatures below. The fabric is highly durable, easy to maintain, and resistant to mold and mildew. This product ships in approximately 1 days