Double Memory Foam Mattress Topper
If you need to find a double memory foam mattress topper check out Great Memory Foam. They produce their own products and have a wide range of mattresses to suit all bed sizes, from single to deluxe Super King size models. Memory foam has been attributed to helping posture and providing users with a long nights sleep. This is because the mattress was designed with pressure points in that react to weight and movement.
The top layer of memory foam allows your weight to sink in and leave n impression which the top layer of foam embeds into the mattress. You then get supported based on your shape, and not what the mattress tries to impose on you. You can find out more info on the Great Memory Foam website.