The sloping coccyx cushion is an excellent option for those who have to sit for long periods time, such as a person who works in an office. The sloping coccyx cushion is also good to use in a car by placing it on the car seat. They are high quality and made of polyurethane foam which is considered to be very resilient. The cover can be made of various materials, but is usually made of velour camel that is completely washable. The sloping coccyx cushion works by tilting a persons pelvis and retaining the normal lumbar alignment to help prevent coccydynia. This also has a cut-out feature at the rear of the cushion which prevents the pelvis from touching on a hard surface.