PRICES MAY VARY. Waterproof: Increase waterproof layer, constructed of Nylon, defend both sunshine and water. Recommend to install the shade sail with a hardware kit that's sold separately. Measurement: Recommend 1.5 to 2-foot space for each D ring and fixing points to increase the tension, and make your waterproof sun shades for patios strong. Good Choice: Shade&Beyond sun shade sail perfect for lawn, patio, dooryard, park, sandbox, garden, pool, pond, deck, backyard, kailyard, and other…