I am about to start my first T-shirt quilt. I went to JoAnn's and found a salesperson who had made many T-shirt quilts. She asked me if I wanted the panel to be pliable or stiff after the interfacing was ironed on. I wanted it to be pliable. She recommended Pellon SF101 White Shape-Flex Fusible Interfacing. She said it was the best. It isn't cheap, but the salesperson said it would be worth the extra money because it was so good to work with. I got mine on sale for 50% off. I purchased a whole bolt and it was $50-$55 (after the 50% off). I have yet to work with it. Hope this helps.