Dynamax ELITE 20lb Soft-Shell Medicine Ball All Dynamax medicine balls are 14" in diameter, impact-absorbing, moisture and scuff resistant ELITE balls are triple-stitched and made from military-grade materials for higher quality performance and even greater dutability Ergonomic design maintains neutral spine increasing stability and max power Cored construction allows for use at max velocity without risk of injury Consistent design and manufacture ensures balls always remain balanced