Shimano Sustain offers superior durability and sensitivity. It is equipped with Hagane reinforced gears made of forged duralumin, which was employed only on SW models, and water-repellant body construction, X-protect system, which prevent salt-water coming into gear box. MGL light weight rotor and titanium alloy bail wire has less inertia to acceralate fast. Advanced gear system X-SHIP offers highest gear efficiency, and friction free cranking. Carbon cloth drag washers offer stable drag pressure relardless of heat. You will surely be satisfied with the comfortable fishing with the New Sustain.