Engineered with aerospace-grade Aluminum Alloy, the Mizuno PWR Alloy offers great performance and durability, while also providing a balanced swing weight for increased swing speed. Multiband Barrel: This design incorporates multiple thickness levels along the barrel to create a wider sweet spot for more forgiveness and power. One-Piece Construction: For maximum mobility and comfort. One Year Warranty: Warranted from defects in materials and workmanship for a period of one year from the date of purchase. Cushioned Grip: For comfort and a soft feel. USA Baseball Approved: Approved for USA Baseball play.