I recently used the iron-on batting tape from Keepsake Quilting and it worked very nicely. It is then and light weight. I will probably try a lightweight Pellon interfacing when I run out of this because it is probably cheaper and easier to get. I also felt this was simpler than zig zagging as my pieces didn"t want to stay together to good while I was trying to sew them. Have also hand whipped them but I still like the seam tape better.