| A memory foam mattress is normally denser than a | | | | of straw or other organic materials. A vital change |
| typical foam mattress. This makes it all more | | | | was lifting them off the ground, to avoid dirt, pests |
| supportive-and heavier. It is usually seen as a good | | | | and drafts. To make memory foam beds much more |
| compromise between the comfort of a soft | | | | comfortable, the top layer is usually a mattress. |
| mattress, as well as the supportiveness of a firm | | | | Initially, these were straw bags for most individuals |
| mattress. A memory foam mattress can actually sell | | | | and filled with fluffy feathers for wealthy individuals. |
| for more than customary mattresses, but they do | | | | Subsequently, new fillings such as artificial fillers and |
| indeed last longer. When it's new, the memory foam | | | | cotton became common. Currently, most mattresses |
| usually emits a distinct chemical odor which many | | | | use solid foam, water, springs or air. The second |
| individuals find unpleasant. The odor fades with airing, | | | | layer is the "divan" or box spring. It's a large |
| but several people remain sensitive to it. Respiratory | | | | mattress-sized box that contains wood and springs |
| irritation can be the result of emissions from the | | | | which provide suspension and additional support for |
| memory foam mattresses. | | | | the mattress. The bed frame is the third layer, as it |
| Memory foam mattresses were first developed by | | | | lifts the mattress/ mattress-box spring right off the |
| NASA to ease the pressure of G-force during the | | | | ground. |
| space shuttle take-off. The memory foam was | | | | Memory foam toppers reduce tossing and turning |
| never used in the NASA space program, but was | | | | that is normally associated with uncomfortable |
| used in medical applications subsequently. For example | | | | sleeping. They allow air to circulate beneath one while |
| with bed-bound patients or those suffering from | | | | sleeping, as they ensure a comfortable, cool night's |
| pressure sores for a long period. | | | | rest. With memory foam toppers, you can sleep |
| Memory foam mattresses were originally too | | | | soundly for the entire night on a cool memory foam |
| expensive for general use. However, in recent years | | | | pad to provide support for comfort. Memory foam |
| it has become less costly to foster and is now vastly | | | | toppers wick the heat away from one's body to |
| available. Its most typical domestic applications are | | | | keep one cool. Due to the revolutionary air circulation |
| pillows, mattress toppers (mattress pads) and | | | | advancement, memory foam toppers are suitable for |
| mattresses. Memory foam mattresses usually sell for | | | | all types of climates, any time of the year. The |
| more than customary mattresses but they last much | | | | progressive cut offers extra support where you |
| longer. | | | | need it, and of course softness exactly where you |
| Memory foam beds come in a vast variety of shapes | | | | want it. |
| and sizes. The early beds were little more than piles | | | | |