Designed to be used on top of your existing mattress. Aches pains and joint stiffness eased. Moulds to the individuals body providing even pressure distribution. 100% Top quality high grade visco elastic memory foam. Supplied without cover foam only. Suitable for patients in medium / high risk categories(with appropriate nursing care). Please note that this product can normally be manufactured by our UK supplier and be available within 2/3 days of receiving your order.