There were many large dug out rooms beneath the surface that linked to the tunnels. Often they served as meeting places or in this situation sewing rooms. Uniforms and shoes were made here. This sort of looks like one of my sewing machines. It was a singer!
Shoes were made out of old tires. The straps were threaded through the soles. The ends of the straps were not trimmed. This caused the shoes to not leave footprints. I thought this was especially cleaver.
Here are some scraps from the shoe making process. Shoes are still being made for tourists who want the real experience.