Our best car cover is the result of over a decade of material engineering. Stormproof consists of millions of microscopic yarns which go into this advanced Micro-Fiber material. Stormproof does not need any coatings or treatments to achieve the highest level of protection. The fabric retains its original properties over the life of the cover, where lesser materials which require coatings or treatments lose their protective ability over time. Feels more like an expensive golf jacket, yet is tested to offer our highest level of water-resistance and breathability. And like all Coverking premium car covers, Stormproof uses the fewest seams to produce a perfect, custom fit without a "patchwork" look found on competing products.