Detailed Description : Through months of intense testing Evil Sports has isolated the key frequency patterns that are present during the ball impact along the barrel of many of todays bats. Evil Sports paid special attention to some of the most recent ASA bats and recorded the specific group of unique frequencies that were generated. Then they turned their factory resources to developing a polyurethane blend that would replicate the antagonistic frequencies causing an increase of energy load upon impact. This process is called Harmonic Optimization Technology or HOT. Evil Sports has combined this latest innovation in polyurethane core construction with our highly successful Vapor Block cover to create what testers have called the best ball they have hit for ASA. This unique mix of technology will be found only in the Trump Evil ASA 11" Softball. Features : - Premium Yellow Leather Cover. - Red Stitch. - .44 Core. - 375 Comp. - Poly Core. - ASA Stamp. - 11 inch.