Compared to innerspring mattresses, memory foam mattresses are far superior in providing you the overall support you need for restful slumber.
The origin of memory foam technology came from the innovation experts at NASA. In the 1960s, they developed a type of foam material that evenly cushioned astronauts as they were subjected to the incredible g-forces of lift off.
A Swedish company, Fagerdala World Foams, then developed this technology and in the 1991 the first TempurPedic memory foam mattress came onto the market. Tempurpedic, Sealy, Serta, Novaform and Bodipedic are the top memory foam brands.
In the past twenty years, the technology behind making visco foam mattresses has been refined so as to be both cheaper and easier. Today, there are even green or natural memory foam beds that are ten percent soy based. However, all memory foam manufactured in the United States is non-toxic and flame retardant.
Visco-elastic memory foam is another term for memory foam. This name emphasizes the increased viscosity or its body contouring ability. Because of this ability, these mattresses will react to the shape and temperature of the body placed on it and mold itself around that body.
This means that all parts of your body will receive the best support and you shouldn't feel additional pressure on your hips or shoulders as you sleep.
These foam mattresses are recommended for people who have trouble sleeping or wake up with back pain or pains in their joints. They are also ideal for people who must remain in bed for unusually long periods of time, as they can prevent bed sores and other circulation problems.
Memory foam beds are more expensive than traditional spring mattresses because of their additional manufacturing cost. This manufacturing process, while non-toxic, does leave the mattress with an unpleasant plastic-like odor that generally dissipates in a few days. Rarely, if ever, will someone display an allergic reaction to visco-elastic foam.
Memory foam mattresses are rated in a number of ways. When choosing your mattress, you should first look at the weight. The higher the number, in pounds per square foot, the more visco-elastic the foam will be; the easier it will mold to your body. Then look at the ILD rating, or indentation load deflection.
This number tells you how easy it is to dent the mattress. The higher the ILD number, the harder the mattress will feel to you. Resilience rates how springy the mattress will feel, and how quickly it will regain its shape after you move. High quality models are made with higher density foam, which will have greater durability and be much less prone to sagging.
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