The Balance Pods allow you to get a total body workout as you simultaneously improve your balance, coordination and agility. Use the Balance Pods for both upper and lower body exercises, developing core strength and stability. Incorporate the Balance Pods with a Ballast® Ball, Exercise Ball or any Balance Trainer utilizing both sides; flat side down for a more stable base or dome side down for added challenge. The Balance Pods are 6.5 in in diameter and have raised rings to provide grip and comfort for the hands and feet.