The retractable PVC coating used in retractable roofs produced in Saye-Roshan is manufactured by Germany’s Mehler ( Mehgeis) Co. The coatings’ expected lifetime is more than 30 years. The main components of this coating is a compact texture of polyester fibers, two layers of PVC coating (in order to protect fibers) on the back and front of the polyester fabric, and a final acrylic coating for the complete protection of the PVC coatings. Anti-flammability, 100% waterproof, dust-free and easy to clean are of important features of this coating.