We have soft and stiff cords made of polyester and aramid, nor- mally the raw yarn are twisted and dipped by RFL or RF free to offer them adhesion in order to combine with rubber. Just as their name implies, soft and stiff are characterized by the touch and the stiffness. Soft and stiff cords could be used in hoses, air springs, v-belt, timing belt, etc. Most of the popular structures are in our categories.