Milliard Coccyx Comfort Memory Foam Seat Cushion Specially shaped memory foam seat wedge fits between you and your seat and then contours itself to your backside for tailored support. A great way to remove strain and pressure from your pelvis and lower back while sitting. Correct bad desk posture and make your day a little less painful. Take it with you to the office, use it at home, in your car, on planes, busses, and anywhere else you sit! Measures 17x14x2in.