Everlast 5 lb Weighted Exercise Ball: * Exercising with the ball improves core strength, function movement, overall muscle tone and flexibility * By strengthening the core muscles of your midsection (abdominals, obliques, hips and lower back) everyday tasks become easier and more enjoyable * 5 lb weighted ball * Soft-touch vinyl covering is easy to grip * Unique design, ball does not roll away * Compact for convenient portability and storage