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What You Should Know About Memory Foam Beds

Sep 7, 2008
Density is the most commonly talked about attribute of a memory foam mattress. In general, higher quality beds are made from higher density foam and shoppers look to density as a way of assessing quality in a mattress. High density memory foam beds are more expensive because they have more foam per bed, but they offer better support and more durability.

Measuring high density foam involves weighing a sample of foam, measuring its dimensions, and using the data to calculate a value expressed in pounds per cubic foot (pcf). Memory foam beds range in density from 2.5pcf to 6.0pcf. It is common in the market place to express density simply as a number of pounds (lb or lbs). For example a 5lb high density foam mattress indicates a foam density of 5 pounds per cubic foot.

Memory foam is designed to support the entire body from head to toe. It will give you the exact amount of support you need by recognizing your body weight and temperature. It will actually contour to your sleeping position and cradle your body for a great night of sleep.

The most common misconception about memory foam mattresses is that density is relative to firmness. In fact density is not directly dependant on firmness. For example, a 5 lb density memory foam mattress can be softer than a 3 lb density memory foam mattress. Foam firmness is expressed as an ILD (Initial Load Deflection) rating. ILD ratings range from 10 - 16, higher numbers being more firm.

Foam is made up of thousands of tiny cells. The cells are formed by a polyurethane wall and filled with space (air). Higher density foams have thicker cell walls and less space inside. Lower density foam has thinner walls, greater space. If foam were made too dense, its cell walls would be too thick / stiff. It would be hard to the touch and would not conform to the body properly. It costs more to make dense foam, and at some point it can be made too dense. So there is a balance that needs to be struck between performance, cost, and durability. The marketplace today has gathered around a 5 lb memory foam mattress as the optimal choice for bedding. While more expensive than lower density foams, it provides better, long term contouring support.
About the Author
Learn more about Electropedic Adjustable Bed by visiting http://adjustablebedsreviews.info, a popular website proving free adjustable beds and mattresses advice and reviews.
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