The Accu-Back™ Seat Wedge helps relieve backache and fatigue while also maintaining the natural curve of the spine. Th wedge's tapered angle helps to encourage correct posture and restores the backs lumbar curve. Can be used with any kid of chair- desk, car, arm, and more. It has a removable, washable, stain-resistant Polyfoam cover is easy to clean. Ideal for those with back pain, arthritis, or who spend much of their time sitting down. 17"W x 16"L x3" back depth. Available in Black, Grey, or Navy.