Miken SYCHBU 2015 Psycho Balanced USSSA Slow-Pitch Softball Bat Miken's proprietary HPI Injects Ultra tough epoxy into the highest grade carbon fibers at 750 pounds per square Inch. Extreme pressure and premium materials produce game changing performance and durability 100 Comp is the revolutionary formula that changed the game and introduced certified Miken High performance equipment. It is engineered utilizing 100% Premium Aerospace Grade Fiber for legendary performance and durability Made in USA