Yanis memory foam mattresses are made with high quality visco elastic memory foam with density rating not less than 55kg and not more than 80kg. the base foam in our memory foam mattresses is with density 35kg and 40kg. Our memory foam mattresses are constructed with open cell structure thus helping the memory foam to breathe. Yanis memory foam mattresses don't feel hot as we use Coolmax and Outlast covers. Yanis memory foam products are designed to response quicker to body pressure and keep yoour back and spine always in the correct position during sleep. Our memory memory foam mattresses are made in the UK and meet the relevant fire safety regulations. All the mattresses from our memory foam range are available for free next day delivery.