Visco: resistant to change of shape.

Elastic: able to return to its original shape after being forced to change.

Imagine lying on a surface that knows exactly how far to let you "sink in" so that every point on the contour of your body is supported and then "flows" back to its original, flat shape? much like pushing your hand into the surface of a bowl of water. The water would flow to fill every contour and crease of your hand, then return to its original shape once your hand is removed.

Contour-Visco-Elastic material becomes softer in warmer areas where your body is making the most contact with the surface and remains firmer in cooler areas where less body contact is being made. If you lie down on your back, the heaviest parts of your body, typically your hips, sink in further than the lighter parts, like your feet. As your hips sink in, the material rises to meet your upper thighs and lower back?eventually filling any gaps along the contour of the back of your body. As the material molds to your shape, your body becomes supported in the correct anatomical position with your neck and spine in perfect alignment.