I have a top-of-the-line CalMark Sunbrella custom cover for a 17.5' Bigfoot
trailer for sale
. Cost $560.00 new - perfect condition, never used. Best reasonable offer + shipping.
This material is warrantied for 6 years...the longest I've found anywhere in any material.
To quote CalMark - "CalMark fabrics are water resistant, breathable, non-abrasive, mold and mildew resistant and have the highest UV prohibitor available".