The perfect device for live warm up before games and soft toss. Flexible, sturdy PVC composition that is resistance to tearing and UV treated. Lasts much longer than your average wiffle balls and don't go as far. The flexible PVC composition makes it a challenge to square up the ball. Hitters have to concentrate hard on their swing in order to hit the AceBallz far. This will translate into better swings for real games. This product is approximately the same size of a baseball. Perfect for both baseball and softball players. For softball players, this will make the regular ball seem huge! They are sold in packs of 12.