Purchased two years ago, used for 2-3 days with a cushion cover, and then left unused. This is a "square balance cushion" that allows you to train your core simply by sitting on it. * You can perform a wide range of exercises, from simple sitting exercises to advanced exercises with high intensity. * The cushion shape provides a stable and comfortable sitting experience. * It can be used with standard cushion covers (45x45cm), allowing you to use it with a cover of your preferred design. * You can adjust the balance level by adjusting the amount of air. - Brand: Eclear Elcom - Color: Gray - Included: Pump Thank you for viewing.