Description _x000D__x000D_The balance disc is an important strengthening tool that can be used by adults and children. The simple act of sitting on the disc activates core abdominal and trunk muscles. Flexor and extensor muscles work in tandem to keep your balance on the disc while continuously strengthening and toning. Through these small, continuous motions that you are making, deep core muscles are constantly stimulated and enhanced._x000D__x000D__x000D_Features _x000D_ _x000D_- Color: Black. _x000D_- Material:PVC. _x000D_- Size: Approx. 33 x33cm/ 13 x13 inch (LxW). _x000D_- Balance disc promotes core stability, strengthens muscle tone, improves balance and body posture._x000D_- Used as a wiggle seat to provide sensory input, and to help calm children that have a hard time sitting still._x000D__x000D_- Ergonomic seating, relieves back pain and shoulder aches_x000D__x000D_- Balance cushion provides an unstable surface to exercise on, requiring you to use more muscles to stay balanced._x000D__x000D_- A hand pump is included for adjustment. Stability disc size of13 inches / 33 cm diameterPacking list1 x Inflated Stability Wobble Cushion_x000D_1 x Air Inflator