This cushion features a cooling fabric with a cool-gel core that helps decrease your body temperature to provide maximum comfort during extended periods of sitting. Its ergonomic design promotes healthy posture, improves circulation and relieves spinal pressure to help reduce the discomfort, fatigue and stiffness that can result from prolonged sitting. The unique shape alleviates the pressure on your spine and supports sciatica relief by minimizing the contact between your tailbone and the seat cushion. Honeycomb memory foam provides durable and professional structural support to maintain its shape beyond 80,000 uses and the machine-washable cover maintains its color wash after wash to keep your cushion looking new.