When piecing with 100% cotton fabric, it is important to use a 100% cotton thread. Choose a neutral color (many quilters use white, cream or gray for all of their quilting projects) or choose a thread to match the fabrics you’ll be sewing. (I use matching colored thread).
Good quality cotton threads produce less lint than lower quality cotton threads and are visibly “smoother” than the lower grades of cotton thread. High quality threads, which produce less lint, are also good for your sewing machine.