Double Duty: Waterproof sun shade sails provide 99% rain resistance and protect against 90% up to 95% harmful UV rays to make your patio privacy safe, cool, and fabulous. Perfect for patio, lawn, garden, pool, pond, deck, backyard, park, sandbox, and other outdoor activities, our sunshade sails provide you with a cool summer. Quality Control: Made of 100% brand new UV-protected high-density polyester shade fabric with strong stitched seam and durable D-rings in each corner. Allows cooling breezes and light to pass through for a better airy and comfortable space. Installation Guide: Installation hardware kits are required and sold separately, each D-ring will require one cable rope. Connect the other ends of cables to existing poles, trees, or walls with shade sail hardware kits. Install at a 20-40 degree angle with maximum tension to allow runoff. Maintenance: The fabric has been treated with a waterproof coating, good for rain and sun blocking at the same time, needs to tilt the shade sail in a low-high position to to prevent water accumulation during use. Warranty: Sun shade sail comes with 3 years limited warranty, and free replacement if you are not satisfied with our product.Note - The shade sails come with curved sides to enhance pull strength and prevent drooping. The length and width mean the longest distance of curved sides from corner to corner. The middle center of the sails will be shorter in width due to curves. SunnyRoyal is the factory, from raw material to finished product production and size customization, quality is the first.95% UV BlockageBlocks 99% of rain, significantly reduce the temperature and UV sunlight in shaded areawaterproof Fabric MaterialThe only sun shade sail on the market that are made of 240 GSM 100% Virgin (non-recycled) high density polyester material.Reinforced EdgeAll edges are constructed with heavy duty double layered reinforced stitched seams, prevents frayed edges and out of shape.