Upholstery, Carpet and Seat Covers Fabrics, carpets, and colored materials used to manufacture seat covers, carpet sets and other cosmetic items will vary in color from dye lot to dye lot. So for example, a gray seat cover made today will be a slightly different color and texture from a cover made from a different lot of material years ago from the same manufacturer. SOR recommends if you are interested in carpets, seat covers and other fabric items matching color and texture, that they be ordered at the same time so the items are made from the same dye lot of material. SOR can not be responsible for color and texture of items purchased at different times.