The yoga ball is suitable for excellent exercise alternative for any age and fitness level. This premium exercise ball makes working out more effective. Suitable for yoga, stretching, kids sensory training and more. Features -Color:Assorted Color -Material:PVC -Size:55.00X55.00X55.00cm/21.61X21.61X21.61in - The fitness ball strengthens key muscles in the abdomen and improves endurance, posture, and balance when used in rehabilitation, strengthening and toning exercise programs. - Since the yoga ball is unstable, you have to use your body’s core's strength to remain balanced, which in turn improves flexibility alignment. - Position ball between your body and the floor or wall to improve stability, balance, and muscle endurance. - Suitable for yoga workouts that focus on strengthening your balance, toning, posture and sculpting muscles. - The yoga ball is made from PVC material, able to sustain up high pressure and stand up to the hard workouts. Package list: 2 x Sets of Yoga Balls