Marucci CAT7 Silver 3 BBCOR Baseball Bat, 2 5 8" Barrel Size:33 30 Fixed cotton EVA foam insole 5717504 Backpack Ryl Fixed cotton EVA foam insole that is shock absorbent DURABLE TITANIUM: Made with a durable Nano Titanium technology AZ4X Alloy construction provides increased strength and a higher response rate Multi variable wall design creates an expanded sweet spot and thinner barrel walls that are more forgiving after off centered contact Second generation AV2 Anti Vibration Knob features an upgraded finely tuned harmonic dampening system for better feel and less negative vibrational feedback Ring free barrel technology offers greater performance with no “dead” spots One piece allot construction provides a clean