Features: Breathable fabric High grade foam for supporting Special wedge shape with U cutaway for your tailbone Designed to relieve nagging backaches, numbness, and discomfort while you sit Seat Solution Cushion with U shape curve to restore the spine's natural Release the pressure on the spine, providing safe and healthy sitting Specification: Item Type: Seat Cushion Materialï¼? cotton Fabric main componentï¼?polyester fiber (polyester) Fabric main componentï¼?content 80 Filler: Memory Foam Color: as pic show Size: About 45*35*7cm Weight: About 490g