Combat B4YB Youth Baseball Bat -10 PMT (Percision Molded Technology) allows Combat engineers to design barrel wall thickness to maximize barrel trampoline effect & bat performance. BFT (Blended Fiber Technology) is used to create more trampoline effect without sacrificing durability. GT (Gear Technology) has a special taper in the barrel, which provides a softer feel and greater performance. ACT (Anisotropic Composite Technology) varies stiffness along the handle reducing sting and across the barrel for softer feel and improved bat performance. Approved for play in LLB, DIXIE, PONY, AABC, BABE RUTH, and USSSA.