Memory foam mattresses are a type of bedding that is sensitive to both temperature and pressure. Memory was designed engineers in NASA in order to provide comfort and protection for astronauts during liftoff and reentry into the earth's atmosphere. The memory foam mattress is designed to distribute pressure evenly over its entire surface and the return to its original state after the pressure is removed. It is also designed to be breathable. Special pillows that were made from memory foam were first introduced to the general public. These days, memory foam is also available in the form of mattress sets and mattresses and come in many depths anywhere between 3" and 6". Pads that are made from memory foam are than 3" and are used as mattress pads for existing traditional beds. Memory foam mattresses are about the same price as a regular mattress of the same size. The most popular types are about 5" and have both a firm and a soft side. A memory foam mattress can be bought from regular bedding stores and on the Internet. There are numerous bedding stores that sell full memory foam mattress sets and mattresses that are packaged in boxes and are very affordable. They are frequently less than traditional mattresses. The memory will rapidly expand to its full size after it is taken out of the box package and the vacuum sealed plastic that is around the mattress is opened. Memory foam mattresses that are purchased are often less expensive than those purchased in retail bedding stores. It is easy to find the best deal on a memory foam mattress with a little research. There are many people who consider sleeping on a memory foam mattress as the best sleep that have ever had. Memory foam mattresses are regularly recommended for people who have joint and bone problems as well as problems with their back problems. Nearly all memory foam mattresses have a cover that is made from an antimicrobial fabric that will resist dust mites that may very well relieve the symptoms of people who suffer from allergies. There are many reasons to buy a memory foam mattress. They offer unparalleled sleep comfort, they are reasonably priced, especially if they are bought on the Internet, and they help people who suffer from allergies. Therefore the next time you need a new mattress, you should consider a memory foam mattress.