1–the microscopic shape of the fibers: polyester fibers have a soft surface without wrinkle. 2–special weight of the fibers: special weight of the fibers is about 1/38 3-lenghth and caliber of the fibers: length and caliber of the fibers can be determined according to the kind of usage. 4-durability of the polyester fibers: polyester fibers have a good durability. Durability …