According to Callaway's own product listing the HX Tour 56 has. "An ultra thin, very durable cover [which] delivers unprecedented consistency and professional velocity. The new Sub-Hex design with Concentric Core Technology provides incredibly stable ball flight and more consistent overall performance. " For the technically minded the HX Tour 56 has: a Polybutadiene core with a firm ionomer boundry layer, and also features a thermoset urethane cover material and hex aerodynamics.

• Ball Size: 1.680"
• Ball Target Weight: 45.6 grams
• Core Material: Polybutadiene
• Core Diameter: 1.550"
• Boundary Layer Material: Firm Ionomer
• Boundary Layer Thickness: 0.045"
• Cover Material: Thermoset Urethane

Callaway Golf Balls are the fastest growing golf balls on the PGA Tour. Long a respected and innovated club maker Callaway Golf entered the golf ball business in the 90's with a commitment to the same quality standards that they subscribed to in the golf equipment business.

The results were an original line of Professional golf balls that include the Callaway HX Tour 56. The golf ball of choice for Phil Milkelson