The Callaway Tour ix golf balls are slightly firmer and longer than the Tour i, and feature a tungsten-infused outer core that moves weight away from the center of the ball for a higher moment of inertia for less driver spin, which results in more distance and accuracy off the tee. Its Thermoset urethane cover generates short-game spin for more greenside control. It also features refined HEX aerodynamics with a Sub-HEX design that reduces drag for longer, more stable ball flight. Its Reaction Injection Molding process creates a seamless cover with uniform thickness for more consistency.Own this? Tell us about it.