Adding a Zipper to Worbla Posted on April 27, 2017 by Amanda Cat’s Cosplay Kingdom has created some really impressive work, but I’ll admit I was so excited to see they came up with a way to securely attach a zipper to Worbla, for their conical underskirt! Take a look at the process below: Working from their template, they covered craft foam with Worbla to create the base skirt. What you will need: A Zipper (we suggest heavy duty), thumbtacks, and glue. Glue your zipper down, then press the thumbtacks into both zipper and worbla to anchor it. If the points come through the other side, cut them off with wire cutters. Heat up another strip of Worbla and cover the edge of the zipper and thumbtacks with it, pressing firmly. There you have your fully anchored zipper! Reheated to better fit the shape of her hips… The final shape is absolutely fantastic, don’t you think?