Eight supporting ribs and reinforced rib pockets hold the polyester canopy on this 9-ft patio umbrella steady to provide reliable shade over outdoor seating. A vented double top lets air move through the 9 x 8.1 in canopy to help relieve wind pressure and improve overall stability. The crank handle lets you open and close the umbrella smoothly, while a push-button tilt mechanism allows you to angle the canopy as the sun shifts. A 1.5-in diameter pole fits common patio table openings for flexible placement options.