Make the most out of each workout session by taking advantage of the versatility that the Medicine Ball MG-1015 can offer your workouts. The balls allow you to use them in a variety of different ways to target different muscle groups in the body depending on how you use them. These include the hamstrings, shoulders, glutes, core, back quads, chest, shoulders and more. Each of these balls comes in a variety of weights for you to choose from depending on your current strength levels at any given time. The product is manufactured out of a blend of PU leather, rubber and PP cotton.