MATERIAL: The shade sail is made of 185gsm high density polyethylene (HDPE) fabric, which is UV protection. It has strong stitched seams, and D-rings at each corner for easy attachment of the canvas. PERFECT DESIGN: Breathable knitted fabric allows breeze to pass through to create an airy environment, and water to drain away so it does not accumulate on the canvas. Please note that the shade sail may not be made from a single piece of fabric due to the width of the canvas. MEASUREMENT: The size of the shade sail is measured from one corner with a ring to another. Please note that our canvases are curved on their sides to improve their strength. Therefore, the actual shade area will be slightly reduced. You can use different sizes and colors of shade sails to get a larger shade area. EASY TO INSTALL: We provide 1.5m rope for each corner. During installation, remember to leave a margin of 45-60cm between the fixing point and the ring. We suggest you install your shade sail with 2 sides higher than the others to allow rain to run off. USAGE: Can be used for patio, lawn, garden, swimming pool, pond, yard, park, carport, pergola, driveway or other outdoor occasions to protect against harmful UV rays.