I question the dictating of where to purchase fabrics for anything --- as far as i know it is my dollars and my choice. I have been fortunate to get a bit of a discount for charitable work, but that is not the deciding factor where I purchase. That said, the type of fabrics for donation quilts depends on where it is going --- Children's Hospitals have specific requirements and I check before making. I have also found that cotton holds up well to children and animals and is washable. So, good quality cotton with a cotton batting --- in case of the unimaginable fire situation, cotton chars and falls away not melts into bodies. I also try to avoid using flannel for that reason. I remember using a quilt with an old wool blanket that was the batting to put out a fire when my son was at the exploring age. Thank God that the person who made the quilt used good quality (even if recycled) fabrics.