Originally Posted by mpspeedy
I think the theory has always been that cotton thread is best for cotton fabric. Unless you are making an heirloom quilt like a Baltimore Alblum etc. I wouldn't worry about it.
Use what ever materials or notions you can afford. Quilts are meant to be loved and cuddled. Cotton thread is not the only kind that will keep you warm.
TRUE! I did read somewhere that polyester thread is stronger than cotton and the issue is that you don't want your thread stronger than the fabric it is sewn into, since quilts are subjected to washing, the theory is that the cotton top will wear out before the thread, or that the thread will cut the cotton quilt top. :-)