What is a Memory Foam mattress?

With development that owes more to NASA than a bed manufacturer (Visco-elastic) memory foam mattresses mould to each user's shape. Using body heat, the foam is softened and this provides support and allows for natural movement throughout the night. They also allow for correct spine and posture alignment when sleeping on your side and are hypo-allergenic. Once the user has left the bed, the mattress reforms into its original shape. They are extremely well suited to different weight variations between partners as each part of the bed is completely independant from another. Memory foam mattresses may require occassional rotation to allow for even wear.