Infinity Drive: The new main shaft supporting structure improves winding torque by 30% while allowing incredibly smooth and light rotation. This essentially means having the benefit of a quick line retrieve HG ratio reel but with the power and winding torque similar to that of a PG. X-Protect: By combining our water repellent coating and our specially designed, water channeling, labyrinth construction, X-Protect provides high-level water resistance without sacrificing light gear and rotor rotation. IPX8 Water Resistance to create long-lasting durability without sacrificing performance Hagane Gear: With amazing strength and durability, the HAGANE Gear is at the very heart of the reel. Shimano, through the application of state-of-the-art technologies, gives you the long-lasting smoothness and pleasure that you feel when you first use a reel, over and over again. No cutting work is applied to the teeth of the drive gear. Instead the entire surface is calculated in minute detail by special 3D design and then formed by Shimano's cold forging technology Cross Carbon Drag: This drag material provides a wider range of drag settings, along with the smoothest Shimano drag performance ever.