IBF Iron Body Fitness Pro Series Exercise Ball, Anti-Burst, Pump Included, Available in 55, 65, and 75 cm Use the IBF Iron Body Fitness Pro Series fitness ball to perform a range of exercises to build muscle strength, and improve your flexibility, balance, and coordination. Replace your chair with the ball for a passive workout that improves your posture and tones your body. Its anti-burst design ensures the ball won't burst if punctured, instead, it will deflate slowly. Inflate and deflate with the included pump. Available in 55, 65, and 75 cm sizes. Use the IBF Iron Body Fitness Pro Series exercise ball to improve your balance, coordination, flexibility, and muscle strength Tone your body Ideal for a variety of workouts including yoga and pilates Replace your chair with the ball for a passive workout while sitting, which improves your posture Extra-thick, anti-slip PVC construction Anti-burst strength of 1,000 lb. (453.6 kg) Won't burst if punctured, instead, it will deflate slowly Dual-action pump included Available in 55 cm (21.7 in.), 65 cm (25.6 in.), and 75 cm (29.6 in.) diameter sizes