The 12-pack outdoor pickleball balls are made from plastic, and exceptional seam welding offers greater durability and resists splitting. 40 small, precise holes to minimize wind interference and create a balanced, straight flight pattern, 2.85 inches in diameter and 0.85 ounces in weight, with great bounce and flexible response. The balls are designed for outdoor and hard-court play, also used for baseball and softball training drills, expected to have a life of 5 to 10 games in harsh conditions, depending on the weather, play style, and court surface, meeting Usapa/Ifp standards.