1Olive shape speed ball, Inflatable inner bladder, with elastic rope at both side to be fixed, and you can train, sturdy. 2This boxing punching ball is widely used to practice the punching speed, it will enhance your endurance, speed and accuracy. 3Designed with high-quality PU leather, practical and durable. 4Easy to fix and use, hard to fall off. 5Suitable for boxing, free combat, kickboxing or other punching training.