Maybe cutting squares of the sweat shirt scenery and using quilters cotton sashings to put it all together.I would use light till medium weight interfacing. i jsut went to Walmart and bought bolt. You want the iron on with little bumps on one side. Oh I cut the sides open and the sleeves off, then I lay it open and cut a very large over sidezed piece. I iron on the interfacing using a damp tea towel. After it cools I cut it to size.