The Visco Therapy Pocket Memory 2000 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.A pocket spring system is included for extra comfort with bouncy support and a reflex foam boundary is used to prevent you from rolling off the mattress. The Visco Therapy Pocket Memory 2000 Mattress uses a layer of boy moulding memory foam Developed by NASA, memory foam is a unique layer of high density visco-elastic polymer gel which is heat and pressure sensitive.Recommended by chiropractors and doctors alike, it gives an elastic ability which allows it to conform to your body shape to relieve pressure points across the body. This improves blood circulation and improves your sleep. Visco Therapy Pocket Memory 2000 Mattress uses a Pocket sprung system A spring system is used to provide support alongside a bouncy comfort which materials such as memory foam cannot do alone.Each spring is individually wrapped which allows each spring to react independently from one another. This allows for two people to sleep together without affecting one another when moving.