Worm bin bag for indoor vermicomposting and easy separation of worms from compost

Step 7 Fold each half inside out and insert nylon cord in top and bottom edges

Each sewn half is like a tube now, that should be turned inside out so the seams are on the inside. They can be stacked on top of each other now and the nylon cords (or shoelaces) can be strung through the top and bottom of the bag. The cord needs to go through each half, right next to the sewn parts and loop through, connecting both halves. See the detail image. If you are using my old shoelace method will need to tie 2 together to span the length of the top edges.

Do the same for the bottom edge and slide the cord stops onto the ends to hold them together. Do it on the top cords too.