Sunbrella of course is the only fabric you should think about when you live in southern AZ.  I've had other cushions rot / disintegrate in our intense sun in just a few months whereas the sunbrella will literally last 10+ years and not fade or disintegrate.  Plus they are a breeze to clean.  The dimensions were exact, the color matched my other "canvas henna" fabric.  My only complaints are: 1) these are two separate cushions (rather than one hinged piece) which wasn't clear to me in the write-up, and 2) there aren't any ties.  So for $20, I ordered a yard of matching sunbrella fabric online and hand made and sewed ties to each of the $$$ cushions.  Seems for this price, I should not have to add my own ties, but otherwise very happy with product.