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 with a Harley dartex multi stretch waterproof cover. Suitable for patients in medium / high risk categories (with appropriate nursing care). If this product is showing as out of stock (red dot), please note that as we manufacture this product on site it can normally be manufactured and available within 2/3 days of receiving your order.