Memory Foam Density
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When considering density in a memory foam mattress, size does matter.
This is because the denser the memory foam in a new mattress, the better the feel and comfort of the sleep experience. Memory foam mattresses are typically graded by the density in pounds per square foot of the chemicals used to make the foam. So, the body contouring effect of a memory foam mattress is enhanced by products with more pounds per square inch.
Memory foam has its roots in the scientific world. It was invented for NASA in the 1970s to cradle astronauts from powerful g-forces experienced at lift-off. From there, it made its way into the medical world and eventually to the public in the 1990s.
Since then, the Memory Foam mattress market has expanded with more and more offerings. Now, more than ever, it’s Important to know what makes a quality memory foam mattress.
Memory foam mattresses are desirable because of their ability to mold to the contour of the body to create a cradling effect. With memory foam mattresses, denser foam tends to make for more of that sought-after memory foam feel. But there is no single perfect density for memory foam products. Usually, the higher the density foam product the better, but variables exist.
A four-pound density of memory foam dictates that each cubic foot weighs four pounds. If a firmer mattress is desired, a five or six-pound density is recommended. If a softer bed is sought, a three-pound density will work well, although lower density products tend to not hold up as well over time.
Amerisleep beds have a high density orthopedic support core that helps maintain spine alignment. Amerisleep beds are also one step ahead in the use of a newly developed “temperature neutral” foam technology that ensures that the firmness level of the mattress is not affected by room temperature changes like other more temperature-sensitive mattresses.

