PROIRON Exercise Ball with Self-Guided Illustrations, Anti-Burst Gym Ball, Swiss Ball with Pump for Yoga, Pilates, Fitness Strengthen your core and improve your posture with PROIRON Anti-Burst Gym BallGym Ball is big, round and inflatable, its unstable to sit, lie or lean on. This constantly improve your core muscles balance.Suitable for men and women. Easy to start your workout, with the help of Illustrations on the ball. Exercise Ball with Self-Guided Illustrations Exercise guide is printed on the gym ball with high tech, firm and safeGet a quick start workout with posture shown on the ballHalf an hour a day, make your body stronger and more flexible. How to inflate the exercise ball? Let the ball sit at room temperature for two hours.Inflate the ball to about 80% of diameter initially.
