Tetrad Upholstery in Ralph Lauren Signature Fabrics. Signature Collection. This sharp collection of sofas and chairs reflect how hard Tetrad Upholstery try to develop new directions. From their very British origins to the Ralph Lauren fabrics that adorn these comfortable and stylish pieces. Recently arrived in our showroom, this collection is bound to be a run away success. For more information call us on 0115 9258347 or email info@kingsinteriors.com