99.9% WATERPROOF - With a splash-proof surface coating and a double polyurethane coating on the inside, the shade sail is made of two pieces of fabric. The fabric seams are treated with hot-seal adhesive, preventing water from seeping through. Water pressure resistance: 400 mm HH - 600 mm HH. QUALITY ASSURANCE - Dominguez fabric is made of 160 g/m² polyester. It features high tensile strength, aging resistance, corrosion resistance, and radiation resistance. Strong seams and durable 304 stainless steel D-rings at each corner. Blocks 98% of UV rays. PRACTICAL AND BEAUTIFUL DESIGN - The curved design presents an artistic aesthetic and stretches the shade sail better to prevent creases and sagging. All edges have double-reinforced stitching to prevent fraying and edge distortion. Due to the curved sides, the actual shaded area will be slightly reduced. Available in various colors and sizes. EASY TO INSTALL】- Measurements are taken from one D-ring to the other. Leave a 30-45 cm gap between the fixing point and the shade sail for the mounting hardware/hooks/rope (fixing kit must be purchased separately, not included). The waterproof shade sail should be mounted at a 20-40 degree angle and held under maximum tension to allow water runoff. Application】- Widely used for gardens, patios, yards, backyards, courtyards, porches, barbecue areas, driveways, lawns, plant shade, decks, parks, swimming pools, carports, boats, camping, ponds, or other outdoor occasions. Keep your private patio safe, cool, and fabulous. Please read the product page carefully to choose the size.