Tough on the elements yet soft and gentle on your vehicle's paint Stormproof is the result of nearly two decades of research testing and manufacturing. Its amazing microfiber material is untreated uncoated and unprocessed-yet virtually impervious to rain snow ice and extreme sunlight. It is inherently water resistant breathable and immune to the fading effects of the sun. Hands down this is the ultimate long-lasting custom-fit car cover for indoor and outdoor use.