I never gave it much thought till now, but why is polly/cotton suppose to be bad? I have always been taught 100% cotton only in quilts, and I just pitched a garbage bag FULL of polly/cotton blends away.So heres a question for you (because I dont know) if you use polly/cotton fabric, can you use cotton quilting thread? Keep in mind I am a hand quilter, and use cotton quilting thread.