The two that I made did not have any batting. I used two 10" squares of flannel sewed them wrong sides together from diagonal corner to corner (so there was an x holding them together) that made each square, then sewed squares together using 1/2" seam allowance, then clipped each row and column to seam lines so there was fringe thaw was 1/4 to 1/2" wide and not quite 1/2" long (that was really slow and painful even though I used rag clippers). Then threw in wash several times to get the fringes to fray. The two layers of flannel were thick enough to be comfortable without being too heavy.
Rob