foverhom Gel Seat Cushion for Long Sitting,Office Chair Cushion for Tailbone Pain Relief,Non Slip Orthopedic 50 Density Slow Rebound Memory Foam Car Seat Cushion with Handle and Concealed ZipperInner Core Upgrade: Our seat cushion is made of pure premium 50D CertiPUR US memory foam with 12% higher density structure,provide the right firmness and more long lasting support. It covered with 80% gel pad for more comfort and superior cooling U Shaped Design and Perfectly Shape Your Buttock: Ergonomic seat cushion help alleviate sciatica tailbone pain and lower back pain while reducing pressure on the coccyx tailbone and promote healthy posture