I have to agree with Macybaby! I would not use a thread that is intended to be combined with like thread for serging, overcasting, etc. Quilting thread is generally heavier and, therefore, stronger. It's your quilt, so you use what you want, but I won't spend time making a quilt and use serger thread to quilt it. If I'm going to quilt, I use the product that is specific to quilting. Quilts undergo a lot of stress during it's quilt life -- I use the thread intended for quilting! JMHO