Coccyx Gel Cushion alleviates back pain while you sit. Cut-out relieves pressure on tailbone and spine, allowing you to sit more comfortably for longer periods of time. Portable so you can use it on any chair in your home. Cushy 3 high density foam cushion with a gel pad in the center comes with an easy-care washable fleece-topped navy cover. Measures 16 x 18 x 3.