These cushions are made of memory foam that, unlike ordinary chair cushions, conforms to the body during use while retaining their supportive shape. The outer fabric is made of durable material to withstand daily use and is removable and machine washable.Memory foam material conforms to the body while retaining its supportive shapeWorks well with office chairs, passenger car seats, plane seats, train seats, stadium chairs, wheelchairs, etc.Outer fabric is durable, removable, and machine washableThe extra cushioning, improved support, and optimized weight distribution can help improve posture and comfort