Balance Cushion [Color] Blue [Size] 41 x 26 x 6 (cm) [Uses] Used for core training, pelvic adjustment, or to improve posture when placed on a chair. [Features] The surface has protrusions (unevenness), and sitting or standing on it can be expected to promote blood circulation and activate muscles. [Specifications] It is a soft, disc-shaped device that is inflated with air. By balancing on an unstable surface, it trains the inner muscles. Stored at home. Cleaned. Thank you for viewing.