The Pressure Relief Cushion has been designed to reduce the pressure when sitting. It helps to distribute weight evenly and maintain the correct pose. A washable cover is provided. The Pressure Relief Cushion can be used with most types of seats, including car seats as an infill. The Pressure Relief Cushion is manufactured from the finest materials available. When used correctly it is designed to give many years of reliable, troublefree service. Clean your Pressure Relief Cushion using a mild detergent with a slightly damp, soft cloth only.