Comfy zone Coccyx Orthopedic Comfort Foam Seat Cushion (Gray) Assists in the relief and treatment of lower back pain, numbness, and pressure sores Reduces pressure on the coccyx, tailbone and hip bones while sitting. Helps with treatment of sciatica, pressure ulcers, injured tailbone, and more Patented design promotes healthy weight distribution, posture and spine alignment Superior comfort for bench , train , chair, car seat, plane or wheelchair Removable Zippered, velour cover is machine washable and allows for easy cleaning. Special introductory price exclusively on Amazon (for limited time only)!