PREMIUM ERGONOMIC COMFORT: Enjoy comfortable sitting all day long with this premium chair cushion filled with 100% high-density memory foam and cooling gel. Ergonomically designed with a round cutout in the center to promote better posture, the memory foam conforms to your body's contours while keeping its shape even over time and the additional gel layer provides superior cooling comfort anytime, anywhere. TAILBONE SUPPORT & PRESSURE RELIEF: This Ergo Collection donut pillow is specifically designed to relieve pressure on the tailbone while providing maximum comfort during long periods of sitting at your desk in the office or while working from home. The seat cuhion's ergonomic shape helps to reduce lower back pain and pressure on the hips and supports with recovery from spinal injuries.