DeMarini 2015 NVS Vexxum Senior League Baseball Bat New NVS (New Velocity System) barrel design brings power and speed together by letting geometry do the work to create an explosive sweet spot X12 Alloy barrel lets us have thinnest possible barrel walls so we can keep the weight down and open up the sweet spot C6 composite handle created with a wide weave pattern offers more stability and responsiveness Low Profile D Cap is scientifically tuned to absorb vibration while maximizing power and keeping the swing weight low Half + Half construction creates optimum weight with a burst of ball launching energy at impact