Step 7: Zipper Folding
you will lock both ends separately.
starting from the inside, and going to the outside, there will be a flap, then a pocket, then another flap, and another pocket. We'll call these 1,2,3,4 respectively. Fold the inner flap (3) into the inner pocket (2), then fold the outer flap (1) over 2 and 3, and into the outer pocket (4).
do the same to the other end.
i would suggest taping flap 3 inside the pocket to hold the wallet together better.