I would think if I wanted to use a light weight shirt, I would test the backing to see what I wanted to use. Two issues to consider: can you fuse this? Is the fabric content able to be ironed enough to fuse it? If it is, I think I would try a double sided fusible with the shirt on top, fusible in the middle and a light weight, preshrunk muslin underneath. I would like to know what you decide and why.