Features: 1. Unique textured surfaces: With 2 differently-textured surfaces to suit your needs. One side has small bumps that's great for anyone looking for a smoother surface to sit on, while the other side of the air stability wobble cushion has more pronounced nubs that are great for massaging your back while seated or offering great tactile feedback. 2. Improves energy levels for active lifestyle, strengthen the core stability muscles to relieve neck and back pain. 3. Effectively help children stay focus and sit still, it allows them to sit still for longer and stay concentrated better. 4. The inflated stability wobble cushion is made using professional-grade anti-bursting PVC complemented by a leak-free design. 5. Experience the versatility: This balance stability cushion can be discreetly used on your office chair instead of a conspicuous balancing ball to improve posture and help manage back, neck & hip pain, or can be introduced into any workout regimen to strengthen the core. Specification: Material: PVC Diameter: 33cm Notice: 1.Due to the different monitor and light effect, the actual color may be a slightly different from the picture color. 2.Please allow 1-3cm differs due to manual measurement. Package List: 1 x Inflated Cushion