Frendia Upright Combi Chair Seat (Red Color) Top Deals in Korea!!! Frendia Upright Combi Chair Seat to regain a healthy sitting posture!!! Do you often feel uncomfortable sitting for long periods of time? Poor sitting posture not only causes a burden on the body, but also may cause various health problems in the long run. Frendia Upright Combi Chair Seat is a product specially designed to improve sitting posture problems, allowing you to sit for a long time. It can also maintain a good sitting posture and reduce the burden on the body. The Frendia Upright Combi Chair Seat is made of high-density foam and breathable mesh, which is not only comfortable to sit on, but also breathable and not easy to breed bacteria. The design of the Frendia Upright Combi Chair Seat is inspired by ergonomics and can effectively improve sitting posture through scientific design. The slight inclination of the front of the cushion effectively reduces pressure on the lumbar spine and ke