Originally Posted by JamieGeek
The one I have is Tyvek. Sunbrella would be more durable but more costly.
Honestly I had no idea Sunbrella was/is even an option for an RV cover...something I may consider when replacing our current one.
Adco makes Sunbrella versions. If doing custom, it's something like $25 a foot for Tyvek and $35 a foot for Sunbrella, so about 40% more for Sunbrella. I imagine a similar price difference on the non custom ones, but purely a guess as I didn't price them.