Cushion Rx Premium 3-Layer Coccyx Ortho Seat Cushion with Memory Foam, Comfort Foam and Cooling Gel.No Other Seat Cushion with This 3-Layer Design Cushion Rx Premium 3-layer Coccyx Orthopedic Seat Cushion with Memory Foam, Comfort Foam and Cooling Gel. Patent Pending **No Other Seat Cushion Made With This High Quality 3-layer Design**