The memorypedic visco 1000 mattress with cool flex has a unique upper layer of visco elastic polymer gel that was originally designed for nasa missions this amazing material provides excellent support for your back and spine aids blood flow and allows you to find the perfect sleeping position to help to eliminate tossing and turningthis mattress not only offers high levels of support but quality features too the fabric is sanitised and the dry cleanable cover zips off so is ultra practical