We have the Californiacamping.de set. 12 years old and still like new.
Wouldn’t be without them, used mainly for increasing space under the awning when it’s raining, but on those rare occasions (like today) when it’s red hot, they are invaluable as well. All 3 pegged out wide (rather than Velcroed together) seems to get whatever breeze there is to pass through and creates a nice cool environment.