This 13 foot square Skyspan umbrella has a solid powder coated structural aluminum frame with internal gearing mechanism. Includes a removable handle that makes opening and closing the umbrella easy to do. The umbrella commercial grade canopy is made from a PVC coated polyester fabric which is both 100% waterproof and UV proof. The retractable umbrella range has been wind rated by engineers withstanding 75mph when opened and 93 mph when retracted.