It is referred to as a fact these queen foam mattresses are the most flexible and the softest. Not only that , they are thought to be the most useful. For this reason there's a great need for them in the marketplace. How did this first come to be? Just four decades ago, National Aeronautics of Space Administration, or NASA was requested to create and build a cushioning that's intended to hold astronauts up. The group was told that they would need to make a surface which is successful in impacting gravitational energy all in the body.