Matsuta Inflatable Anti Burst Yoga Exercise Ball Perfect for exercising, gym workouts, strengthen your core, yoga, balance training and fitness, stability, core and ABS, aligning spine, Great as active seating office chair, pre & post-natal birthing exercises and therapy when pregnant, bouncing Newborn to sleep Burst resistant, dense rubber walls offering superb support and Control extra durable professional-grade anti-burst material provides a user-friendly and safe experience Suitable also for pre & post-natal birthing exercises and therapy when pregnant Features soft rubber surface for increased comfort