My umbrella cover arrived within a few days as scheduled.  It is the perfect match to my 11 ft cantilever umbrella and is made of a heavy duty coated fabric that should last for several seasons.  The heavy duty zipper and the wand makes putting the cover on the umbrella a breeze.  No more standing on a step stool.  The cover secures the umbrella tightly to the swing arm and keeps it from blowing in the wind