Sun-DURA® is a 100% marine grade polyester fabric with a 100% polyurethane finish coating (600 denier). This material was specifically developed to provide superior water repellency and UV resistance, and it is a Carver Industries exclusive. Sun-Dura® is our most popular boat cover material, and because it is so water repellent, it makes a great choice for areas which receive a lot of rain. It is also a solution dyed material, which means that its dye is inherent to the cover's fibers, causing it to be exceptionally fade resistant. Sun-DURA® weighs 7.6 oz per yard, and has a 7 year warranty.