RS7-X Lumbar Cushion gives your back curve more support made for that extra bit of comfort for office chairs. What is it? RS7-X is designed with the highest quality memory foam from the best memory foam manufacturer in the world. One of our work from home essential accessories for long-lasting comfort while working long hours at your home office. The super-soft pillow cover is removable, machine washable, and made of 100% breathable polyester that keeps you cool. RS7-X is firm yet comfortably soft and conforms to the natural curvature of your back to continue to provide the support you need for long hours of sitting. With an adjustable strap, it can fit anywhere, anytime.