Exclusive to OPTP, The Soft Movement Ball features an easy-grip texture and assists with body positioning during stretching and stability moves that challenge core strength and balance. Its unique larger size is great for those who find the smaller 9” Soft Gym Overball too challenging, and it provides versatile support during exercises that target hard-to-reach muscle groups such as the abdominals, psoas, hips, glutes, quads, and hamstrings. Inflation can be increased for additional firmness and instability to create a more challenging workout. Ball features: Approximately 12” dia. Requires inflation Supports up to 220 pounds Lime green Latex and phthalate free Pump sold separately. Use the Soft Movement Ball as a yoga ball, Pilates ball, therapy ball, small exercise ball. These balls are also great as exercise balls for physical therapy, balance ball for exercise, exercise balls for working out, small yoga ball, and more.