C.CTN Memory Foam Seat Cushion Chair Pads Chair Cushion with Tie, 4 Piece, Purple Size:16*16Inches Reduces pressure on the coccyx, tailbone and hip bones while sitting Comfortable seat for individuals sitting in chairs, riding in cars, scooters, etc. Assists in the relief and treatment of lower back pain, numbness, and pressure sores The sculpted design is anatomically correct and provides maximum comfort. Removable velvet cover is machine washable and allows for easy cleaning