The Visco Therapy Memory Mattress is made from unique upper layer of high density visco-elastic polymer gel. Originally designed for NASA missions, it is soft and pliable following the outline of your body perfectly. So comfortable, the mattress provides the best possible support to your spine allowing your body to immediately find the best sleeping position, reducing tossing and turning. The extraordinary features helps blood to flow and circulate freely, preventing the nerves and muscles from numbing. The Memory Coil mattress also has a 8cm boundary made of reflex foam around the Bonnel springs to prevent you from rolling off the mattress while you sleep. The traditional coil spring system is used to give you the extra comfort that you deserve. Mattress comes complete with a beautiful cover which is zip off and dry cleanable. Specification. 5cm Visco foam. Traditional coil spring system. Dry cleanable double jersey cover. Zip off cover. Available in regular comfort only. Orthopedic mattress. 5 Year customer warranty. Anti dustmite features. Made to british standards/regulations.