Katsuno-style Beautiful Posture Habit Compact, Raspberry color. There are no noticeable stains, and it's still in usable condition. If you're concerned about your posture or are looking for a cushion for your chair, how about this? It's sold on Rakuten Ichiba for about 7600 yen, so I think it's a good deal even though it's used. Below is information from the product page. -------------------- [Size/Capacity] Body weight 1300g ■Size: Width: Back 380, Seat 490mm Depth: Back 330, Seat 420mm Height: Back 90, Seat 110mm *The above body size is in mm [Product Description] ☆ A seat cushion for chairs that supports your posture just by sitting on it. ☆ The unique shape fills the gap between the chair and your body for a perfect fit, making it comfortable to sit on for long periods of time. ☆ Guides you to the correct sitting posture. ☆ Three-dimensional hold seat naturally supports your buttocks. ☆ The backrest, which creates an S-curve, is movable, so it can be customized to fit the user's body type. ☆ Mesh material with good breathability for year-round comfort. ☆ Separate top and bottom for compactness, can be used individually and is easy to carry.