The mesh fabric for the replacement dump truck tarps is made with a PVC Coating. This Plasticized PVC offers excellent protection against atmospheric agents and adverse weather conditions. These PVC resins are applied to the polyester yarns as the yarns are going through a PVC bath and then tentered with high heat in order to lock fibers into place, therefore giving you high tear strength for rugged applications in the hauling industry. It also allows airflow while containing the load. This simply relieves air pressure which normally tears most fabrics.