About this item Soft and Comfortable: The outer layer is Polyester fabric and inner is Memory Foam , making it ideal for long periods of use. Adaptive Support: High-density memory foam adapts to your body's contours, providing customized support and relieving pressure points. Ergonomic: The hollow design promotes proper posture and reduces pressure on the tailbone, enhancing comfort for extended sitting periods. Relieve Pain and Discomfort: The ergonomic design and memory foam technology alleviate back pain, sciatica, and tailbone discomfort, making it ideal for those with chronic pain or post-surgery recovery. Slow Rebound: The 5-second slow rebound feature ensures the cushion retains its shape, providing consistent support and comfort. Specifications: Color: gray, blue, black Size: 48*39*14cm/18.9*15.4*5.5 inch Package Included: 1pc * Outfany Ergoseat Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.