The StayBall is weighted so it doesn't roll away during your workout.
Dual-Action Hand Pump
The Gold's Gym 55 cm Anti-Burst StayBall™ comes with a convenient hand pump so that you can always keep the correct amount of air levels in your StayBall.
The included workout DVD demonstrates how to use the StayBall most effectively.
Ideal for Heights 5'3" - 5'11"
This StayBall works best or heights 5'3" to 5'11".
WARNING: This product contains one or more chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.