The Coccyx cushion relieves pressure on your spine and tailbone when sitting and is designed to restore your back's natural "S" shaped curve for great seated comfort. Perfect for home, office or travel, the durable foam coccyx cushion comes compressed in a unique compact package and expands to full size when opened. The cushion's cover is also removable and machine-washable for easy care. Cut-out reduces pressure on spine and coccyx (tail bone) when seated|Cushion's tilt restores spines' natural "S" shape|Great for home, office and travel|Cushion automatically expands to full size when removed from packaging|Comfortable and durable foam construction|Removable, machine-washable cover