This is designed to fit any seat supporting the body’s natural need for movement.It requires active participation from the user to assume correct sitting posture.Turns any chair into a comfortable seat which can be used to relieve back pain, stress, restlessness, anxiety, and can help improve your sitting posture.One side is textured providing gentle massage while the other is smooth for ultimate comfort in your home, office, school or anywhere the cushion is used.Good for Posture, Back Pain, Stress Relief, Restlessness and Anxiety is an inflatable sitting and exercise wedge. It features a smooth side and a bumpy side for sensory stimulation.