SilverguardTM Custom Car Covers are available only with Coverking famous Custom Fit and the unique pattern designs which result in the fewest seams possible - Compare the images on the left. Coverking uses the fewest seams to produce a perfect, custom fit without the "patchwork" look created by sewing small pieces together. Although it costs more, Coverking's designs result in superior fit, looks, and less chance of seams failing or leaking. Beware of materials which claim to be similar, but are only half the weight - 150 denier material is not suitable for car cover use. We tests all it's materials, including SilverguardTM, to be compatible with automotive paints and clear coats. Because Must Motoring is TS16949 and QS-9000 certified, all materials used for Custom Car Covers are tested and OEM approved.