Made from HDPE (high-density polyethylene) 180gsm, industrial cross-weaving for superior support & long-lasting durability Ready to hoist upon sturdy connections at all four corners. Easy to install, very thick & durably-enforced webbing. Our shade sail includes 304 Stainless Steel D-rings stitched seamlessly into its corners & comes with nylon ropes for convenience, length & width are measured from D-ring to D-ring Top-quality construction with a multitude of uses such as parking lots, swimming pools, sporting events, pergolas, backdrops, greenhouse decor, barns, etc. Blocks over 95% of harmful UV rays while allowing a light breeze to pass through, perfect for outdoor activities like summer BBQ’s or reading magazines, etc. Installation Instructions:1）All sun shade sails come included with nylon ropes for secure & convenient attachment. 2）If you require additional length to hoist the corners, you can purchase some ropes from your local home improvement retailer.3）Loop the nylon rope through each of the four corners & attach to sturdy connections to prevent drooping. 4）Make sure to double-knot at all four corners to prevent untimely loosening. 5）Feel free to contact if you have any questions or concerns regarding how to properly install your sun shade sail. Thank you for your business!