Updated wedge design helps ease back pain from prolonged sitting. Ergonomic design features pressure relief memory foam interior. Adapts to the unique contours of your own body, and pressure points. Unique hollow inner core helps envelop and ventilate your back for added supported comfort. Lightweight, portable design adapts easily to office chair, car seat or plane. "Heavenly" comfort for those spending long hours behind their computer. Outer two-tone polyester and spandex cover is removable and machine washable