Balls have soft flexible rubber exterior shells. Textured tactile surface easy grasp and catch. Increase or decrease air in the ball to improve grasp. For upper body rehabilitation and fitness exercises. Balls can be used w/trampoline rebounder or a partner.   #10-3295- Set of 2lb,4lb,6lb,8lb,10lb.(MDSP103176) Latex Free UNSPSC#42251600