Tension is evenly distributed so the fabric remains flat and does not sag.
PRODUCT FEATURES:UV Blocking92% Shade RatingStainless Steel D-RingsIncludes 5' PE Ropes for Installation 1 per sideAVAILABLE SAIL STYLES:TriangleRectangleSquareSEASONAL SHADE and SHELTERPerfect for adding shade and ambiance to a backyard, patio, deck, porch, balcony, pool, driveway, pergola, or garden.3. Do not pull the shade sail too tightly when first installing, it will shrink tightly after exposure to sunlight. Our shade sails are proven to hold up through wind and sun while delivering refreshing shade and 92% UV blockage that effectively lowers the ambient temperature.