Mattress Buying Guide
Memory Foam Mattress 101
Visco-elastic foam is a popular mattress component. This type of foam is more commonly known as memory foam. Memory foam has received much attention lately for its supposed ability to relieve back and joint problems, reduce insomnia, and provide a much better night's sleep than traditional mattresses. But is visco-elastic foam really all it's reported to be? This mattress foam is pricey, so you will want to yes sure it really can provide all they claim it can. Let's take a look at this space-age mattress foam, how it is produced, and what it can do for you. Learning how a mattress is put together can provide you the information you need to make the best choice when you set out to buy the right bedding for your situation.
Production and History
Visco-elastic foam is a polyurethane foam, similar to the more conventional foams used in most mattresses. However, this type of foam is made with chemical additives that make it denser and more viscous. This type of foam was first developed under contract from NASA in the mid-1960s. The original goal of the foam was to make safer cushions for aircraft. It was eventually commericalized in pads for X-ray tables and football helmet liners and released to the public in the early 1980s. At this point, few companies were willing to work with the foam, since production was unreliable. One such company produced the Tempur-Pedic Mattress in 1991, opening the market to memory foam bedding. The manufacturing process was difficult and expensive so it was not widely used. Since the manufacturing process has become less expensive, more mattresses have found their way into market.
Initially, these mattresses were used in medical settings, such as situations where patients were bedridden for long periods of time. Memory foam mattresses were shown to greatly decrease the incidence of pressure sores and gangrene from long immobility. Initially too costly for widespread use, this type of foam has become much less expensive, and is now commonly used in pillows, mattresses, and mattress toppers. It's also used to provide padding for people with long term pain and in cushions for wheelchair users.
Visco foam can be up to seven pounds in density (ILD). Memory foam mattresses are normally very dense and heavy, allowing them to provide good support without compromising quality. The unique feel of memory foam is often touted as a compromise between the solidity of a firm mattress and the comfort of soft ones. Foam mattresses are often sold by density. A higher density mattress is more supportive, usually slightly firmer, and also more expensive. Standard memory foam comes in densities between one and five pounds per cubic foot. The foam used in most visco-elastic foam bed toppers and in the comfort layers on innerspring hybrid mattresses is between three and four and a half pounds per cubic foot.
Cell structures in memory foam vary significantly. Some foams have very open cells, while others have cells that are almost closed. Tighter cell structures provide less airflow, and can make the bed feel very hot. Some brands of visco-elastic foam are more open in structure. These brands are sold as breathable memory foam. Breathable foams have better airflow better recovery and retain fewer odors. Since chemical odors are considered one of the negatives of memory foam mattresses, especially when new, this type of foam may be appropriate for people who are sensitive to these odors.
Some types of memory foam give off a strong chemical odor when they are new. This smell decreases over time, but some people do remain sensitive to it. These emissions can cause respiratory problems. However, visco-elastic foam mattresses have also been credited with reducing the severity and frequency of asthma attacks. This type of foam is less likely to harbor dust mites or mildew than conventional mattress materials.
Like other products made from polyurethane, memory foam offers a slight fire danger. All bedding in the United States must be resistant to ignition from open flames, but some worry that the fire retardants used on this foam can cause health problems. These fire retardants are no longer used in similar products in the EU. Memory foam mattresses may also present a danger to infants and very young children, who may have trouble turning over on the foam. However, older children and adults are not at risk, and many find that the foam helps alleviate other health problems.
Memory foam mattresses are a great option to consider when you are shopping for a new mattress. Memory foam softens as it reacts to body heat, allowing it to mold to the body's shape. Because of its ability to mold to the body, the memory foam mattress lacks pressure points and helps alleviate back and neck pain for many users. Another advantage over traditional mattresses is that memory foam mattresses are anti-microbial and resist dust mites. You will want to consider exactly what you want and need as you head out to find the best mattress for you.