When I first started quilting, I could only afford Walmart fabrics. One of my first quilts was a Kalaediscope, made ten years ago and cherished by my daughter. I just had to replace the outer border. It rotted completely -- totally disintigrated. I am now very, very careful about what fabrics I use. All the other fabrics in the quilt were Walmart fabrics and they are ok. So, how do you know which fabrics are bad and which are good?