ALL NEW Hydrofend material packs powerful water repellency & long lasting durability into a light weight woven cloth. This 8 oz. polyester monofilament yarn has high tensile strength and increases abrasion resistance to hold up to the rigors of outdoor applications. A proprietary solvent armors up Hydrofend, making it 6 times more water resistant than non-coated cloth fabrics. Mold & mildew inhibitors and UV resistance keeps Hydrofend performing year in and year out. Welded seams reduce sewing. This lightweight woven cloth material makes it easy to install and remove, a mere 1/3 of the weight of standard vinyl material Our boat covers have a 5 year warranty from the date of original purchase. This warranty includes the material and construction. (Burgundy and Red Hydrofend have a 3 year warranty on color retention).