Top Findings In A Memory Foam Comparison

Many people wonder what makes visco memory foams unique (Tempurpedic foam is supposed to be the best). After all, foam is foam, how different can it be?

The main difference lies in its structure. Regular foams are made exclusively of closed cells, billions of balloons tightly squeezed together with very little air between them. Heat tends to get trapped, because there are very few routes for warm air to escape.

Tempur foam (one of the best memory foams around), however, is made of open cells, billions of balloons with holes in them. There are millions of tiny air passages in and around them where warm air can escape. This makes a visco memory foam mattress less warm to sleep on than other foam toppers or mattresses, but generally warmer than conventional, spring mattresses.

How Open-Cell Foam Works To Relieve Pressure

The open-cell structure of visco foam also explains how a mattress made of it shapes to our body in such a unique fashion, relieving pressure points and supporting your weight.

When you place a load on a standard foam mattress, it compresses but wants to spring back to its original shape immediately. The air in sealed foam cells has nowhere to go, so it pushes back to the same extent pressure is applied. Basically, the foam in the mattress will not just want to spring back in the direction of your pressure, it will also want to spring in the opposite direction.

A visco elastic foam mattress reacts differently. Its unsealed cells 'collapse' under a load, compress fully and spread the air pressure within to adjoining cells. A viscoelastic foam mattress only wants to spring back in the direction of the pressure.

How memory foam reacts when pressure is applied

Because of the way visco-elastic foam deforms, it tends to shape to whatever is applying pressure, but it does not have the strength of spring-back pressure a more conventional foam with air-filled cells has. It is this ability to conform to our body's shape that makes visco memory foam beds feel so unique.

Top Comparison Findings

Disclaimer: is an independent buyers guide and is not affiliated with any mattress manufacturer or retailer. Different mattress manufacturers and retailers may advertise on this website but we are not affiliated with them in any way, we do not act as agents on their behalf nor are we their employees.

All care has been taken to provide consumers with unbiased information on memory foam mattresses. This may include both the pros and cons of different products and of different brands. All our content is based on extensive research on existing consumer opinions found online on countless forums, discussion groups and review sites spanning back 6 years. Our findings are meant to act exclusively as a concise summary of all these consumer opinions we have read.

2.5 lb vs 4 lb density

Which to choose from a 2.5lb visco foam topper 4lb visco elastic foam mattress comparison? Higher density alone does not make a quality sleeping surface. The formula behind the best sleeping surface uses best quality, high-density foam that responds to body temperature.

Known Brands

What is the secret behind Tempur-Pedic mattress technology and why is it in the top 5 most popular brands alongside the likes of Sensus, Isotonic, Bergad and Sealy? The answer is that it uses good quality, high density, heat responsive foam.

How Long Does It Last?

What affects the expected lifetime of a visco matresses and does a Tempur-Pedic mattress last longer? The answer is years and years as long as it's made of better quality, higher-density foam.

Real NASA Link

Many manufacturers claim viscoelastic memory foam was first used by the NASA Space Program to boost sales for their memory bedding.

NASA never did use that basic material in the 1960s. NASA matress or space matress technology simply does not exist as such.

The truth is the Swedish Tempur-Pedic company did eventually come up with a reliable formula now used in the best-selling Tempurpedic mattresses.

While Tempur-Pedic Swedish mattresses are commonly known as Swedish mattreses, not all such products made in Sweden are made of slow rise foam.

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