I mix and match Batiks and other cottons together without a problem. Made one last December for ME and mixed them on the top, cotton and batik, and used a cotton 108" back. Works fine. Even though the price of 108" cotton may seem high, you only need as much as the shortest length of the quilt, no piecing and no leftover, so the price is actually cheaper than buying two lengths on 45 " fabric and having to piece it together.