*compressed Foam 15.5 X17.5 X1-7/8 * At Home In The Office Or In Your Car Youll Enjoy The Unsurpassed Comfort And Support Of Our Foam Cushion * Improves Seating Safety By Preventing Slipping * Useful For Prolonged Seating On Hard Surfaces * Helps Maintain An Upright Sitting Position * Made Of Quality Foam For Consistent Support Comfort And Durability * Removable Polycotton Cover For Easy Cleaning