Incredible to the core. Literally. Introducing the all-new, ultra-performance X-ROCK "TEC" series softballs, exclusively available from Softball Bat Club. Whether you're in the Sunday afternoon "IF" game of your tourney's championship bracket, or taking the field for your Tuesday night league game, the Tournament Edition Core+Cover - TEC - is your new secret weapon. The hyper-thin TEC composite cover was designed to reduce drag and friction during flight, making it ideal for those players looking to maximize exit velocity and distance. More aerodynamic than rawhide or synthetic leather covers, the X-ROCK TEC series offers pure performance. Hidden beneath the TEC performance composite cover is the monster POLY-TEC core. Featuring a proprietary blend of performance-grade polyurethane, the POLY-TEC core is responsible, dependable and powerful. Hot or cold, wet or dry, the X-ROCK Tournament Edition Core delivers. Available in 44 COR/ .375 compression (ASA Approved), 52 COR/ .300 compression (ASA Approved) and 40 COR/ .325 compression (USSSA Approved), all your bases are covered.