Mesh Cover, 100% Polyester Cover Ergonomic Design for Superior Comfort and Support: Unique U-shaped cutout suspends your tailbone, reducing pressure points and relieving pain, while the contoured shape promotes proper posture and spinal alignment to alleviate lower back discomfort from prolonged sitting Breathable Mesh Cover for All-Day Comfort: The breathable mesh cover allows air circulation to keep you cool and dry during long hours of sitting, and is machine washable with a zipper for easy removal, ensuring convenience High-Density Memory Foam for Durability and Support: Made with high-density memory foam that retains its shape over time, providing consistent support and comfort, and features a non-slip rubber base to keep the cushion securely in place on any surface Portable and Versatile Use: Lightweight design with a handle for easy transport, making it perfect for office chairs, car seats, wheelchairs, or any seating area. The compact dimensions (18'' x 14.2'