About this item Train Your Reflexes: It can help train your , punching speed, fight skill, the to improve hand-eye coordination and reflexes and hand eye coordination while providing an interesting workout Three Different Levels of Boxing Balls: Consists of three boxing balls of different levels, black ball is designed for the beginner; Once you can control it, change to red ball to practice with; Green ball is heaviest and most difficult Suitable for: Suitable for men or women, teenagers or children, even boxing ; Everyone can use it to train, have fun or release stress Great for Burning Calories: The unpredictability of the rebounding ball, coupled with the of your punches will burn out your arms, chest, shoulders and upper back, for calorie burning and conditioning Silicone Material: Made of gel material, anti-wear, scratch-resistant, and no harm to you during training