A support chair that keeps your back straight! Just by sitting, your back naturally straightens, helping you develop good posture. It's easy to carry and can be used throughout the house, in various situations such as on the sofa, with a work chair, or when sitting cross-legged on the floor. Recommended for those who work from home. M size. I will give it to someone who needs it. I haven't used it much. I think the condition is quite clean, but please check the photos. Thank you for looking.