Reebok Gym Ball - Two Sizes Available

• Get back on the ball and churn out those moves with this essential stability companion
• To nail the perfect sizing, plant both feet on the floor with knees positioned slightly lower than the pelvis.
• If you see a nice 90-degree angle, crunch on
• High-density rubber construction for longevity
• Anti-burst technology for slow and safe deflation if punctured
• Weight can influence flexibility and resistance, so size appropriately
• Material: Rubber & Plastic 
• Package Content: 1 x Gymball

Dimensions (Diameter):

• 65cm
• 75cm