Tulle is a special form of embroidery made with silver or gold threads from Rural Egypt. The artisans work one stitch at a time, cut the thread off and move on to work on the next stitch. This gives the design the exact same pattern when seen from the back or the front.
This embroidery technique goes back even further than the Coptic and Islamic era. The women of Shandweel village have collectively revived the heritage of their grandmothers, a 19th century Upper Egyptian tradition.