The Double Outlast® Classic Memory Foam Mattress is 20cm deep & comprises 3cm of high density memory foam upon a reflex foam base. The high quality of foam will ensure your whole body receives the support & comfort it needs for a deep & restful night&39s sleep. If you are looking for a mattress with temperature regulating features & a good combination of pressure relief & support then the Outlast® Classic is a great choice for you. The mattress also features a removable & washable quilted Outlast® mattress cover. Outlast® is a technologically advanced material that was originally developed for NASA astronauts to control extreme temperature fluctuations during space flight. The Outlast® fabric is designed to draw heat away when your temperature rises, the heat energy is stored, & then released when you begin to cool down, keeping your body not too hot, not too cold, but just right during the night. This regulation of body temperature means you're less likely to wake during the night, which ensures the deepest sleep possible. The temperature sensitive memory foam layer provides comfort & support to your shoulders, back & hips, & works in harmony with your body to ensure that you are sleeping in the correct anatomical position, meaning you can wake feeling refreshed & free of any minor aches & pains. Memory foam also offers relief for your pressure points, which encourages healthy blood circulation, as well as reducing the need to toss & turn during the night, meaning a deeper & more restful sleep. The Double Outlast® Classic Memory Foam Mattress is hypoallergenic & antibacterial, & also inhibits the development of dust mites, meaning it&39s the perfect sleep environment for sufferers of allergies & asthma. Manufactured in the UK with quality raw materials & detailed finishing, you can purchase your mattress with the confidence of a 5 year manufacturer&39s warranty from one of the UK&39s leading memory foam mattress manufacturers.