For HS, college, adult senior league and minor league pro baseball. Northern white ash encased in a composite shell. Resin fills the barrel grooves to support and absorb ball impacts. Designed to significantly enhance the life of a wood bat. Uniquely manufactured to sound, feel and perform like popular pro wood bats. Ideal for batting cage work, practice rounds or games. The composite design is much more resistant to breaking and allows the player to get used to hitting with wood.