San Diego Sail Shades 8'x4' Rectangle (Sandy Beach) - Heavy Duty Commercial Grade 205gsm Shade Sail Constructed of Heavy Duty (205GSM) polyethylene fabric. Optimum Ventilation: The unique fabric design allows cool air to penetrate the shade sail providing an airy, comfortable, and well-ventilated space. Ultra-Violet Protection: San Diego Sail Shades have a UV protection rating of 89-93% and shade protection. The amount of protection greatly reduces the exposure of UV rays which can lead to skin cancer. Free Air Conditioning: San Diego Sail Shade's will lower the ambient air temperature reducing your properties cooling cost and energy consumption. The savings will pay for the Shade Sail's over time, with the right design. Includes: 8'x4' SANDY BEACH RECTANGLE Shade Sail, tension mounted steel D-rings double stitched into the corners, sail shade is measured from D ring to D ring, 4' of weather-resistant polypropelene rope for each corner, and carrying case. **(Please note all sail shade edges do curve inwards for aesthetics and durability and are measured from D ring, to D ring.)**