The Lazy Monk Balance Ball bundle comes with the professional Exercise Ball, a strong Warm-up Elastic Loop, a Foot Pump, with ALL needed accessories and an EXTRA pin for the valve. The Yoga Ball is made of thick, super durable PVC, as it was design to last a lifetime! The Fitness Ball helps you develop a good overall muscle tone for your entire body, as you can design a powerful workout with incredible effects on your core stability, posture, and muscle balance. Training on the Exercise balls is one way to work the muscles in your body that stabilize and support all your movements, as just by sitting on the Yoga Balls, you’re able to activate the stabilizer muscles and not only improve your posture, but you also feel more in touch with your center of gravity. Moreover, the Swiss Ball has different other benefits like rehabilitating back, hip, and knee injuries. Sitting on a Pregnancy Ball is wonderful for future mamas, in order to keep pelvis aligned and baby in optimal position.