High Quality Guarantee - Constructed of high density polyethylene (HDPE) shade fabric, blocking up to 95% of harmful UV rays and direct sunlight exposure, with strong stitched seam and durable stainless steel D-rings in each corner. Breathable Design - The fabric is woven in a way that allows air to circulate while blocking a significant amount of sunlight, creating a cooler and more comfortable environment beneath the sail. Right Installation Measurement: Measurement is taken from D ring to D ring, leaving 1.5 - 2 foot space for the hardware kit between the shade sail's D-ring and mounting points. When the installation area is ---AxAxA, you could consider ---axaxa. Equilateral triangle, a85%*A, AxAxA(8'x8'x8', 9'x9'x9',14'x14'x14'...) eg. AxAxA =14'x14'x14', but need to consider the axaxa12'x12'x12'). Product Introduction & Warranty: The edges of the patio shade canopy are curved, preventing rainwater from accumulating on the sail and extending the lifespan of the sun sail. Under normal usage and weather conditions. Ideal Shade Solutions - Widely used over a patio, lawn, garden, pool, pond, deck, play area, courtyard, backyard, dooryard, park, carport, pergola, sandbox, driveway, or other outdoor areas to provide 85%-88% sunshade and protect against 95% harmful UV rays, and make your patio privacy safe, cool and fabulous.