Summit Living 13 ft Large Patio Umbrella Double sided Outdoor Market Umbrella. Constructed with the rust-free Aluminium pole and 12 heavy-duty steel ribs, this umbrella has a good strength and durability, Made with high-grade 180g polyester fabric, this canopy can block out 99% UV rays, a smooth-turning crank make you easy to open or close the umbrella .You can enjoy the weekend with your friends, family or customs under the patio umbrella.