From the trusted experts at Callaway, these Warbird balls were specially designed to help you achieve longer distances and greater ball speed. The softer, high-energy core lends itself to lower driver spin with less drag for longer distances. It's surrounded by a firm ionomer cover, which makes it exceptionally durable and contributes to faster speed. Includes 12 balls. Screenprinted Michelin Man on balls; custom designed Michelin box.