Saying Sunbrella is like saying General Motors , There are more kinds of sunbrella than what your dodger and sailcovers are made from . My wife ( who was a pro boat interior specialist ) just made new cushions for #45 and covered them with sunbrella that is made just for cushions .
She says Sunbrella Spun Splash is good for curtains also Sunbrella Sling .
You need to see the sample books .