AmazonBasics Rectangular Back Cushion Back Support Cushion for Office Desk Chair Memory Foam Black

Back support cushion for all-day comfort. Curved shape that fits the natural arch of the lower back. The movable design allows you to move the cushion to different chairs. High-density memory foam provides firm support for long periods of time. Built-in elastic cord to secure the backrest of the cushion. Breathable cover: removable and machine washable