As a benchmark for comfort and support it doesnrsquot get much better than the astronaut orientated materials used by the visco therapy 4000 platinum mattress constructed using a technologically advanced elastic polymer gel the therapy 4000 offers a nasa level of comfort and support as well as shaping itself to the exact contours of your body this superb mattress works to increase the flow of blood around your body making for a far healthier nightrsquos sleep available in medium and f