Waterproof and Sunproof: The outdoor shade sail is made of high-density polyester (PES) fabric (180 g/m²), which can effectively block 95% of UV rays. The surface of the balcony awning is also coated with a waterproof coating, allowing you to use it in all weather conditions with peace of mind. Sturdy and Stable: The seams of the shade sail are made using sturdy webbing for better stability. The edges and corners are thickened, stitched in multiple places, and reinforced with stainless steel D-rings for a strong and tear-resistant shade. Concave Design: The concave cuts give the patio shade sail perfect tension. The concave shape transfers the tension to the corners. This prevents the canvas from wrinkling and sagging Easy Assembly: Each corner of the rectangular triangle shade sail is equipped with grommets with stainless steel D-rings and ropes for quick hanging from trees, walls, or high posts. We recommend stretching the sails at a 20-40% slope to ensure better drainage Easy to