This was a Christmas gift for my son, so I didn't want to reveal it earlier. My son had a huge collection of old t-shirts that he didn't want to part with, but which were in rather poor condition. I used some iron on interfacing to line them and make them a little more sturdy and less stretchy, then complimented them with some strips of plain t-shirt to make the design. I backed the quilt with a light brown flannel and machine quilted it. I bought a walking foot for my sewing machine which made the project much easier to do.