Mesh Lumbar Lower Back Support Cushion Seat Posture Corrector Car Office Chair Ideal for office or home use. Quickly and easily slips over the back of most chairs. Provides lumbar support & promotes good sitting posture. Helps to reduce back and neck discomfort. Ventilated fabric to keep your back cool. The Mesh Posture Support is ideal for office chairs, use in the home and in the car. Designed to improve posture and reduce back and neck discomfort, the Mesh Posture Support simply slips over the back of the chair using an elastic strap.Comfortable to use, the Mesh Posture Support not only helps correct posture, but can also help to keep you cool. The black mesh construction allows air to ventilate to your back for added comfort during a long journey or day at the office.