It provides additional support you need to maintain good posture and the natural curve of the spine. By evenly distributing the weight of the body, it offloads pressure on the spinal discs. The ergonomic design helps to increase blood flow, prevents pain in the lower back, and helps with muscle fatigue, leg tightness, and hamstring. This ergonomic seat cushion nicely fits most office chairs. This pillow is also a good option to consider if you move around a lot. Take it in your car, on a plane, or a train. Made with pure memory foam, the pressure relief seat cushion uses your body heat to adapt to your curves, giving you the support your current office chair lacks.