Mizuno F23-CRBN1 Fastpitch Softball Bat (-13)X Zone Technology: Creates a massive sweet spot by adjusting composite angles in 10 specific zones across the barrel. Anti Shock Construction: Reduces vibrations felt in the hands for a more comfortable swing. Double Wall: Gives you higher peak performance right out of the wrapper with a larger sweet spot for more power and forgiveness. Cylinder Seaming: Allows for consistent performance and durability across the barrel. Optimized End Cap: Great sound