People talk about thinking outside of the box as if it is a great improvement, but what's so wrong with what's inside the box? Jump right in to this so called box with Kravet Couture 29304-11 Inside The Box in Silver; its design and color is perfectly mainstream but far from banal. It is made out of 46-percent polyurethane, 37%-percent rayon, 11-percent polyester, and 6-percent cotton and is great for interior upholstery applications.