Upgrade your workouts with a Sportime Strength Medicine Ball. With a long-lasting synthetic leather cover and tightly filled interior to maintain its roundness, this fitness ball can be used on the wall, floor, or in the hands for working out the arms, shoulders, wrists, hands and core-strengthening. This yellow/black ball weighs approximately 2 pounds and is safe for use by students of all ages. Some softening of the ball will eventually occur, but the exercise utility/function will not change. Complement with other Sportime Strength Medicine Balls in varied weights for alternating workouts and to challenge the muscles.