The large outdoor umbrella measures 15' long and 9' wide, making it just right for providing ample shade over your outdoor dining table. Made with a steel frame and pole, umbrellas feature three vents arranged in a rectangular shape to promote circulation. Its polyester fabric is made with UV protection, and it resists weather, water, mildew, rust, and stains ? so a rectangular patio umbrella holds up to outdoor use. An easy-to-use crank lift lets you open and close it, and it comes with a base and 2 sandbags that keep it balanced in your garden or yard.