What Do Density and ILD/IFD Ratings For Memory Foam Mean?

We often get asked about the density of the memory foams we use in our memory foam mattress and memory foam topper pads, and once in awhile about their IFD/ILD rating.

And while we are happy to provide this technical data, I want to be clear that these technical specs alone do not give you a real indication of the comfort of a particular memory foam mattress or topper.

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Healthy Foundations’ Comfort Matrix Construction

Why is our Healthy Foundations 10″ Memory Foam Mattress so comfortable that 96% of its over 400 reviewers would recommend it to a friend? It’s quite simply due to our unique proprietary Comfort Matrix Construction™. What is our Comfort Matrix Construction™ and why is it so comfortable?

Our 5-layer Comfort Matrix Construction™ starts with two layers of our boutique memory foam – a 2″ layer of 4-lb density foam followed by 2″ of 5-lb density foam.  This memory foam is made by a small boutique memory foam manufacturer that specializes in memory foam.  Its open cell construction increases air flow by 95% and wicks away heat and moisture three times more than traditional memory foam.  The base foams are 2.3-lb density airflow top configuration base foams.  These base foams are a higher density than found in less expensive memory foam mattresses (1.5 – 1.8-lb densities are common) and are designed to increase airflow.  The bottom base foam has an IFD/ILD of 50 and the base foam above it has an IFD/ILD of 31 (firmer foams have higher numbers).  The final layer of the 5-layer Comfort Matrix Construction™ is the CoolMax™ cover which also helps our memory foam mattress sleep cooler.  (Just 1/2 of 1% of our returns are for the mattress sleeping too hot – a common problem for many memory foam mattresses that we have improved upon.)

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Memory Foam Mattress Glossary

Memory Foam Mattress Glossary
Terms You Should Know Before You Shop for a Memory Foam Mattress

Cover – The cover or ticking is the outside of the mattress. In the case of a memory foam mattress, it is a cover rather than a sewn ticking.

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