Memory Foam
Mattresses Under Oath...The Truth and Nothing But The Truth
by:
Charles "Chuck" Harmon
Are you thinking about buying a memory foam
mattress?Are you confused about all the hype and
confusing claims made by the different advertisements for memory
foam?
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I've set out to clear the air, remove the "smoke
and mirrors", and put into one article all the true information
you'll need to make a selection that will thrill you, give you
years of value and make poor sleep a thing of the past.
The term "memory foam" or "visco-elastic memory
foam" was coined in
the early days of NASA's space program. That's
why it's also known as NASA foam.
Sometimes, a memory foam mattress is referred to
as a NASA foam mattress.
During lift-off, astronauts were being subjected
to tremendous g-forces that the human body just wasn't designed to
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The need for a new material, that would make
these conditions tolerable for the astronauts, spawned the
research that resulted in the invention of this brand new kind of
foam.
If water, springs, air or any combination of
those things had been an alternative, the expensive research that
followed wouldn't have been needed, and the need for a new
material wouldn't have existed.
Visco-elastic foam has unique qualities.
It is able to mold itself to the shape of any
object that puts pressure on it and, yet, when the object is
removed, it will slowly return to it's original shape.
The picture that comes to mind is the hand above
the memory foam mattress that still has the hand print showing on
it.
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Memory foam is an open celled foam, which means
that air is free to move from one cell to another, so when
pressure is applied, the affected cells collapse and you feel sort
of like you're floating down into the material.
This collapsing of the cells allows the material
to "melt away" from pressure until the entire surface of your body
is evenly supported over the surface of the memory foam.
It virtually eliminates pressure points.
Another unique feature of a memory foam mattress
is temperature sensitivity.
Within a short time of your body lying on the
mattress, your body temperature will start to cause the memory
foam to soften.
Any area of your body that has excess heat, such
as a fevered injury, will cause the mattress to soften even
further where it is touching, making memory foam the ideal
material for a comfortable mattress.
The problem with the NASA foam was that it "off
gassed", putting off a smell that was overpowering in the confined
quarters of a space vehicle.
It was eventually scrapped by NASA. To my
knowledge, it was never actually used on any space mission.
At that point, memory foam was just too
expensive to be used for mattresses and the off-gassing wouldn't
have been acceptable either.
A few medical research companies started
experimenting with the material for use in hospitals.
Many patients develop bedsores when confined to
bed over long periods of time.
Because it was cost effective for this
application, these experiments led to using memory foam in a
variety of health industry settings to alleviate pressure points
in hospital patients.
Through this medical research, memory foam
became more and more adaptable to use as a consumer product in the
form of pillows, mattresses, toppers, chairs, etc.
The Memory Foam Mattress Industry Was Born
The memory foam mattress industry started slowly
in the early 1990's and then shot into the mainstream in the late
1990's and early 2000's. So much so, that it's difficult to find a
magazine, newspaper, or television that doesn't have several ads
for memory foam products running continuously.
With that kind of demand for the product it's no
wonder that a lot of people started forming companies to
manufacture and sell to an audience with this enormous appetite.
And, yes, as in all industries, some companies are born just to
make inferior products and, then, using terminology that is
confusing or misleading, capitalize on the lack of good
information that's available to consumers.
So let's clear some of the confusion with a few
simple facts.
What Is The Difference Between Good And Bad
Memory Foam
Memory foam is graded by it's density. Imagine
yourself cutting a huge "dice" (yeah, like the kind you throw on
the crap table) out of memory foam 12"x12"x12" and slapping it
onto the scale in your doctor's office.
The weight of that 12" sized cube is how you
determine density.
For example, if your "dice" weighed 5.9 lbs.
it's considered to have a density of 5.9, or if it weighs 3.2 lbs.
the density is rated as 3.2.
Pretty simple, really, isn't it. Like most
things, we all thought density would be determined by some E=IR
formula or something terribly complex.
You, now, know more about density than most of
the sales people in your local mattress store.
It's also a fact that the less dense foams are
made mostly of air, not foam. Less foam, less cost to
manufacture...they can sell it cheaper.
For most memory foam mattresses, it's a fact
that the human body is best supported by a density of 5.3 lbs. to
5.9 lbs.
Any heavier than this and it tends to be too
dense and won't allow the proper cell collapsing that allows your
body to settle into it.
Any lighter and you don't get the needed support
in the hip and shoulder areas.
Another problem is that the lighter foams won't
continue to return to their original shape after a relatively
short lifespan. They'll lose their comfort.
Some of the 5.3+ lb. mattresses are still going
strong after 15 years being just as comfortable to their users as
the first day...and with no body impressions.
Remember, too, that we discussed temperature
sensitivity.
Not all foam being advertised as "memory foam"
is temperature sensitive.
Make sure it has this feature so you get that
"fine tuned" comfort.
A better memory foam mattress will contain 3
1/2", or more, of memory foam as a top layer.
Any less than this probably won't keep you from
bottoming out and laying on the underlying base layers of foam.
Those foams aren't meant to be in contact with
your body and won't comfortable for you.
They are there to help the memory foam do it's
job correctly.
Just remember density and temperature
sensitivity, when you go shopping for your memory foam mattress
and you'll be miles ahead when you purchase.
© Charles C Harmon Co. /
http://www.memory-foam-buyers-guide.org
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