I have made several T-shirt quilts and have used the light weight fusible Pellon and fusible tricot interfacing. My favorite is the tricot. The heavier interfacings seem to make the blocks heavy and thus the whole quilt heavy. Because of that, I also use a very light batting such as Thermore. When shirts have a number on the back, I have sewn the team name and the number together to make a single block. I have also included computer printed pictures of the team, etc. To finish, I quilted with a medium meander and quilted right over the wording without any problem. Good luck.