[Large Patio Umbrella with Base]The 15 ft x 9 ft patio umbrella provides a larger shade area when fully opened, with up to 135 sq. ft. of shaded area. The pool umbrella will come with a durable base that includes a cross base, two sandbags and a polyester cover. (Note: Each sand bag holds 100 lbs of sand to keep the umbrella stable)[Sturdy Durable Material]Our patio umbrella frame made of 12 sturdy-duty alloy steel ribs for provides enhanced support and stability, and with thick coating to resistant rust, durable. The canopy's double-layer vent design not only promotes airflow but also makes the umbrella remain stable and grounded.[99.9% Uv Protection]This patio umbrella canopy is made of 3-Year Fade-Resistant,Upf 50+ polyester fabric, effectively blocking over 99.9% of harmful Uv rays, ensuring a safe and comfortable outdoor experience. This sizable canopy stands up to the elements.