Coolaroo® Rectangle Shade Sail Kit 16ft 5in x 9ft 11in - Beech The Coolaroo Rectangle Shade Sail Kit - Beech - includes all of the accessories users will need to install the shade sail with confidence and stability. The shade sail blocks up to 95% of the sun's harmful UV rays yet remains totally unaffected by moisture and natural temperature extremes. The sails are easy to clean and won't tear or fray.