This is a foundation piecing technique that has been around for (probably) centuries. It does add a little weight, but honestly the batting is more significant when it comes to weight. If you use a polyester batting or a wool batting (Hobbs or Quilter's Dream), the quilt will still be light enough. Medium or lightweight cotton would also be fine. The only type of batting I would not use is very thick cotton batting, as that batting alone adds a lot of weight. Warm and Natural, for example, is quite heavy for a batting. Hobbs 80/20 would be fine.
Edit: I agree that thin, cheap muslin (washed and dried a couple of times) would add less weight than sheeting. Now that I think of it, though, some of the sheets you can find at the thrift shop can be quite thin and lightweight after all those years of use.
Last edited by Prism99; 04-09-2018 at 12:53 PM.