I strongly advise you to install a vent fan in your RV if you haven't already. You'll feel the change in air quality almost immediately, as well as how much money you'll save on air conditioning expenditures.
I have a SunWave awning fabric. I like how easy it was for me to install this replacement fabric on my awning. The poly cords were quite rigid and almost precisely the perfect awning size for the slots in the railing.