Thank you for viewing. I purchased this about two years ago for my child, but it was only used a few times, so I am selling it. KURA SEAT HB Material: Cover: Polyester, Polyurethane; Cushioning: Polyurethane; Core Material: Polypropylene Product Size (approx.): Width 39 x Depth 34 x Height 27cm Color: Navy Retail Price: 13,800 yen (each) The KURA SEAT HB can be used in a variety of ways, such as placing it on a work chair, dining chair, or bench seat, or sitting on it on the floor. It provides a comfortable seat for teleworking, meals, relaxation time, and other situations. The seat of the KURA SEAT HB has a smooth curve that conforms to the roundness of the buttocks. Unlike the flat seat of a chair, it fits around the buttocks from front to back and left to right, providing a gentle and comfortable seating experience. The KURA SEAT HB's shape supports the pelvis from front and back, preventing the buttocks from sliding forward and posture collapse. With the front rise and rear back support, the pelvis stands up straight and guides you to the correct posture just by sitting, whether on the floor or on a chair. The high-back type has a back that is about 10cm higher than the KURA SEAT, and it supports the lower back. You can sit comfortably for a long time, as if your lower back is being supported by both hands.