The Callaway Big Bertha golf ball has a proprietary formulation that yields an ultra-low compression, highly-resilient core for very soft feel and more legendary Big Bertha distance. This 2-piece Big Bertha Golf Ball combines the best attributes of the Big Bertha Red Golf Ball – power and distance off the tee – and the Big Bertha Blue Golf Ball – exceptionally soft feel around the greens. The Callaway Big Bertha golf ball also features HEX Aerodynamics, a revolutionary design that replaces conventional dimples and creates 100% surface area coverage for optimal lift and drag characteristics. The virtually seamless geometry results in a more efficient and stable ball flight, greater potential distance and consistent performance on every shot.