Covercraft Technalon Block-it Evolution Custom Fit Car Cover is a popular all-weather fabric made with Kimberly-Clark's Evolution fabric that provide an excellent protection value in all weather conditions. Often imitated, but never equaled, U.S. made Evolution fabric covers are used by millions of car enthusiasts around the world. With the highest UPF rating to provide maximum protection against damaging UV rays thus protecting your paint and interior. The Polypropylene fibers are bonded into a durable four-layer non-woven finish that includes a soft bi-component inner layer of polyethylene and polypropylene fibers. The four-layer barrier protects against bird droppings, tree sap and industrial pollutants and the four-layer thickness absorbs impacts to help protect the finish from nicks, dings, dents and scratches. The soft-to-paint Inner Layer is made from Bi-component technology blends of polyethylene for softness and polypropylene for strength to assure gentle protection for paint finishes (inner layer is gray). Two middle layers of melt-blown fibers act as a filtration barrier against most airborne pollutants. This cover is breathable allowing any moisture or heat under the cover to easily escape. Moisture is not absorbed by the fabric fibers which allow it to dry quickly and easily. This car cover comes with four Year Warranty.