I received this as a gift, but I already have a cushion I use, so I'm selling this one. I only used it to try it out. I threw away the box. Shock absorption x high-resilience. Supports the sacrum and straightens the spine. Reduces the burden on the lower back and promotes good posture. *Only when using this product. It completely envelops the buttocks and thighs, holding the pelvis in place. Aims for a sitting posture where the ears, shoulders, and hip joints are aligned. Side: The raised shape fits the buttocks and thighs. Three-dimensional seat: The sacral elevation slope works to lift the sacrum, which is in the center of the pelvis. Back: The shape that covers the lower back pushes out the lower back, giving the feeling of straightening the spine. Back & Protrusions: The large back and protrusions support the sacrum and straighten the spine. Uses high-resilience urethane: High-resilience urethane absorbs shock and supports "comfortable sitting." Uses mesh material: Good breathability and less stuffiness. At home, in the office, as a floor chair. Supervised by Dr. Kenji Kojima, Director of Kojima Orthopedic Clinic. As a student, he grew up as a baseball player through elementary, junior high, and high school. After working in orthopedic surgery and an orthopedic clinic, he opened "Kojima Orthopedic Clinic" in Osaka in 2010. He is supported by a wide range of ages for pain care such as lower back pain and sports injuries, and is known for being visited by many professional athletes, artists, and dancers. ■Material Cover: 〈Seat/Bottom〉100% polyester 〈Side〉50% cotton, 50% polyester Cushioning material: Urethane foam ■Size 43 x 42 x 22.5cm ■Manufacturer: Cojito Co., Ltd. Notes The images may differ in color from the actual product due to the shooting environment. Also, there may be slight differences in size depending on where it is measured. We cannot accept any claims, returns, or exchanges for these reasons. Please feel free to ask for more details. Although it is a beautiful product, it is considered a used item, so please refrain from bidding if you are sensitive to this.