Package Include 1 x Inflated Stability Wobble Cushion Extra Thick Core Balance-Disc for Improving Core Strength Relieving Back (Pink) Features - Material: PVC wobble seat cushion. - Size: . 33 x 33cm/ 13 x 13 inch (LxW) wobble cushion. - Color: Pink. - Ergonomic seating, relieves back and shoulder aches balance disc - Balance disc promotes core stability, strengthens , improves balance posture.- Used as a to provide sensory input, and to help calm that have a hard time sitting still balance cushion. - Balance cushion provides an unstable surface to exercise on, requiring you to use more muscles to stay balanced wobble disc. - A hand pump is included for adjustment. Stability disc size of13 inches / 33 cm diameterGoods Descriptionbalance disc Through these small, continuous motions that you are making, deep core muscles are constantly stimulated and enhanced.balance cushion The simple act of sitting on the disc activates core abdominal and trunk muscles.wobble disc and extensor muscles work in tandem to keep your balance on the disc while continuously strengthening and toning.wobble seat cushion The balance disc is an important strengthening tool that can be used by adults and