Center cloth on the pleat, wrong side facing up and stitch the length of the cloth. Make sure you catch all layers, it may be easier if you use a zig zag stitch.
Flip the cloth up and then fold back half way. Pin at the top about 1 to 1 1/2 inches from each edge and again at the bottom corners. Stitch diagonally from top right pin to bottom right pin and from top left pin to bottom left pin.
Turn the hood inside in (you can trim the corners but I never do) and your DONE! Easy right.