Healthy Lumber Back Support is made from body-hugging that supports body, shapes around contours, and reduces pressure caused by the common shapeless chair. It is designed in such a way that it allows unit to be positioned as a thoracic or lumbar support .If you have a tendency to slouch, this cushion will help you sit up straight and avoid the pain and stress that comes with bad posture. Recommended for a mild to serious back problem where the lumbar spine needs to be kept in extension. The elastic strap helps anchor the cushion to your chair. Very Durable and light in weight. It can be used in office chairs, cars or sofas etc. Removable, hand washable velvet cover.