I use only double fold binding on all my binding work, except when making a quilt for a child. Then I make my own Double-Double binding. Cut lengths of fabric, on the bias, 2 times the width of a normal double fold binding. Fold that piece in the middle and stitch on both sides. Following that step, fold in the edges as in a double fold binding you buy. Makes a very strong finish for a child's quilt and since they are sometimes used as floor pallets or for games, it lasts longer.