nullIncrease Body Flexibility, Improve Coordination, And Develop Strength. It Can Be Used For Back Exercise And Posture Correction. Soften Surfaces And Prevent Slipping With Mat. Great For Use At Home, At The Gym, Or In The Office. The Reebok Ball Is Covered With A Special Anti Burst Shell From A Sudden Rupture, This Is Done So That, If Accidentally Punctured, The Ball Does Not Explode, But Is Blown Smoothly To Reduce The Risk Of Injury, The Shell Of The Ball Is Made By A Unique, Specially Developed Technology That Provides High Surface Resistance To Deformation, Reliable Grip With The Palm.