Kona Cotton Tulip Purple Fabric Only quilting solid to come with the assurance of Oeko-tex (Confidence in Textiles) certification, which certifies that no harmful chemicals were used in the production, processing or finishing of these goods. This fabric has been tested for carcinogenic dye stuffs, formaldehydes, lead, and skin-friendly pH factor. Available in 44&#034; wide yardage, pre-cuts, and extra wide widths