Sitback Rest Lumbar Support Cushion promotes proper posture in any chair. Staying seated for extended periods of time at the office or at home can lead to serious back pain. Healthcare professionals know that sitting too long creates pressure on the spine, distorting spinal curves and compressing discs. All of this can cause pinching of the nerves in the spinal cord, leading to numbness, tingling and back pain. Help protect and maintain proper spinal curve with Core Products International, Inc's lumbar support cushion. This popular cushion made from contoured foam with side support wings provides medium to firm support and helps keep you sitting properly. Use at home, office or in your car. Attached positioning belt keeps cushion in place. Standard covered in a durable cotton blend. 13 x 14 (33cm x 35.5cm)