Sharkskin is a specially formulated polyester that weighs only 6.5 oz. per square yard. Still incredibly strong and durable, this cover provides outstanding protection for boats by repelling water, mildew, UV rays, and other foreign elements. Fade-resistant, breathable finish resists staining and prolongs cover life. Dent & Ding items have minor cosmetic imperfections that will not affect its performance and in some cases it is not noticeable. These products are non-returnable and non-refundable.