Waterproof Shade Sail. The shade sail is sewn with strong fabric to increase the strength of the product. There are 4 corner D-rings sewn into the corners for easy installation and the D-rings are 304 stainless steel are used to improve the resistance of the product. The concave curved edge of the shade sail improves the stability of the shade sail and prevents the shade sail from sagging in the middle. In summer, shade sails can provide you with cool shade. Excellent anti-ultraviolet linearity and shade rate to ensure your patio is no longer disturbed by sunlight. Install the shade sail at an angle of approximately 20 for rainwater to run off easily. The shade sail is made of waterproof polyester fabric (160gsm), woven in 300D and covered with a waterproof polyurethane coating to prevent water ingress (it can prevent at least 1000ml of water pressure). UPF50+, shade rate by 95%. Use natural dyes, environmentally friendly and tasteless, not easy to fade. The product contains: a high-quality shade sail and 4 wear-resistant white fixing ropes (1.5 m each).