95% UV BlockingShade sails provide 80%-85% shade and block up to 95% of harmful UV rays. Our awnings will protect your kids, flowers, plants and cars from the sun, keeping your yard privacy safe, cool and wonderful. HIGH QUALITY MATERIALS AND MORE DURABLEOur shade sails are made of heavy duty oxford cloth with strong stitched seams and durable stainless steel D-rings at every corner. All edges are constructed with heavy duty double reinforced stitched seams to prevent edge fraying and deformation. InstallationAt the beginning of installation, leave 1.5-2 feet of space between the fixing point and the D-ring for connecting the rope of the shade sail. Choose a hyperbolic way higher than the other two angles to hold the shade sail or install it at a 20-40 degree angle, which has a strong pull and can create a tilt that is good for directing rainwater to the edges of the sail rather than pooling in the middle. MeasurementThe shade measurement is the longest distance along the curve of the sail from one corner to the other. The straight line distance from D-Ring to D-Ring will be slightly shorter due to the curves designed to enhance tension and prevent sagging. Ideal Shade SolutionOur 7'x 13' Rectangular Shade Sail Waterproof Canopy is widely used for yard, lawn, garden, swimming pool, pond, deck, patio, patio, backyard, doorway, park, carport, pergola, Sandbox, driveway or other outdoor setting.