1. 33 cm in diameter, portable and durable
2. Promote core stability, increase muscle tone, improve balance and body posture
3. Help reshape your body and improve balance and flexibility
4. It is used as a swing seat to provide sensory input and help calm children who have difficulty sitting.
5. Ergonomic chair to relieve back pain and shoulder aches
6. Provide an unstable surface for exercise, which requires you to use more muscles to maintain balance.
7. Sitting on a cushion will force you to stand in a good position
8. Easy to use, adjust by adding or releasing air