Champro Official Collegiate Flat Seam NCAA Baseballs – DZN\r\nPlay Longer with the MBT ( Moisture Barrier Technology ) from Champro Sports. The MBT increases the useful life of a baseball by protecting it from the harmful effectus of moisture.\r\nMBT is a thin, flexible, polyurethane liner that is applied to the ball just below the cover to prevent moisture from penetrating the yarn winding. Champro Sports MBT baseballs perform better, and last longer!\r\nProduct Features:\r\n\r\nNCAA Approved\r\nCollege Game Baseball\r\nFlat Seam\r\nMBT\r\nPremium Leather Cover\r\nDouble cushion cork core\r\n\r\nItem # CBB-501