out. if not grab some baking paper and sandwich your fabric between it, sew over the fabric as usual, and tear away the paper once done.
grab one of the exterior piece of fabric and one of the pul pieces and the zipper.
place the pul piece right side up.
next put the zipper on top of the pul piece, so the top edge of the zipper and the top edge of the pul piece is lined up.
pin along the top and stitch along the line where the clips are.
pull the fabric around so the zip can see the light of day, and your fabrics are facing the right way around.
i learnt this 