Butterfly-Shaped Seat 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. Ergonomic design promotes healthy posture, improves circulation & relieves spinal pressure to help reduce the discomfort, fatigue & stiffness that can result from prolonged sitting. Its unique shape alleviates the pressure on your spine & supports sciatica relief by minimizing the contact between your tailbone & the seat cushion. Premium, high-density memory foam provides durable & professional structural support to maintain its shape beyond 80,000 uses. Machine-washable cover with quality zipper maintains its color wash after wash to keep your cushion looking new. Anti-slip fabric on the bottom prevents it from sliding using a silicone friction grip so you can sit with confidence.