Very good quality product.  I chose the middle size for parasols up to 2.5m.  It fits the banana cantilever parasol nicely.  It is supplied with a 3 part collapsible rod that can be inserted into a slot next to the zip.  I use the rod to lift the cover over the closed parasol which is too high for me to reach.  Time will tell how the material weathers.  It is a composite material and the specification suggests it should cope with our British weather.