Specially shaped memory foam seat wedge fits in 2 orientations: Sit on it for contoured comfort or place it behind your back for tailored lumbar support. Specially molded foam contours to help remove strain and pressure from your lower back muscles and thighs while sitting. Correct bad desk posture with the cushion behind you to make your day a little less painful. Take it with you to the office, use it at home, in your car, on planes, busses, and anywhere else you sit! When used behind your back, the bolstered sides help keep the wedge centered in your seat and the center comfort ridge provides added spinal support.