Start by laying out the fabric and fold it in half. Now fold the old boppy pillow cover in half as well and place it on the fabric. Cut the pattern of the old cover on the new fabric but make sure you are leaving an extra 1” on all sides. Not cut the piece to another identical piece so that you have two of them. Now place the two pieces one over the other and sew them from the outside and rounded edges. You will need to add a zipper on the inner side of the cover. Don’t forget to add a few more stitches at the end of the zipper, as it will secure the zipper and ensure the durability of the cover.