This 9ft patio umbrella is effective at blocking the sunlight thanks to premium polyester fabric and innovative tilt mechanism. Â It also shows great performance in fade resistance to provide years of elegance. Furthermore this umbrella is supported by a solid iron pole and 6 sturdy ribs which is not easy to shake and deform. The special air vent design can facilitate air flow and make you feel cool and comfortable in hot summer. In addition with a convenient crank the opening and closing become