How is a memory foam mattress better than the rest?

Memory foam mattresses are one of the most preferred types of mattresses. Many surveys have revealed that people who sleep on these mattresses have a much better and comfortable sleep than those sleeping on the ones made from the conventional materials. You must be wondering that what makes them better than the rest. Well, these mattresses are made from a special material called a memory foam which is their distinguishing feature. This material was created by NASA several years back. The contents of the material are all natural and are highly advantageous to the human body. So they prove to be quite beneficial for people having back problem. Moreover, such foam mattresses take the body shape when you lie on them, thereby providing total comfort to your body. Apart from this, they are pest resistant, remain cool in summers and warm in winters and thereby the most preferred.