Harbinger Balance Trainer - 1 unit is specially developed to build your core group muscles. This training tool can be used in numerous ways, making your exercise diverse and multifunctional, since you can target specific muscle groups. You can use this Balance Trainer for standing, kneeling, sitting or laying down exercises. There is also a possibility to exercise in tandem with resistance cables, balls or another Balance Trainer. Besides muscle building, Harbinger Balance Trainer 1 unit helps improve your balance and posture. For your extra comfort it is made of a soft, pliable polymer that can be easily wiped after exercise. Dimensions of this tool are 13” wide and 3” high.