Memory Foam Density: What You Need To Know

If you have been looking at the different memory foam mattress toppers that are out there, you have probably noticed that each has a certain density that they are rated at.

I will give you a quick overview of a few things to think about when looking at the density of various memory foam products such as mattresses and toppers.

How Is Density Measured?

This is actually quite easy to explain. To measure the density of memory foam, you simply take a 12 inch by 12 inch cube of the foam and weight it.

If the cube weighs 3 pounds, the density is 3 pounds. If the cube weights 6 pounds, the density is 6 pounds.

Easy enough.

What is the Difference Between Lighter and Heavier Density Memory Foam?

A memory foam with lighter density will feel softer. You will sink into it faster. It may also wear out sooner than a heavier density memory foam.

“What? They wear out faster? That’s not a good thing!” – at least that’s what I thought initially. Really though, there is no way around it, that’s just the way it is. A lighter density memory foam will wear out faster, probably. But that’s ok because lighter density material is also cheaper. So the cost factor tends to balance out over the long haul.

Don’t let the fact that lighter density memory foam might wear out a little more quickly affect your buying decision, because it’s really all about comfort. If you are more comfortable with a softer memory foam, then get the lighter density material.

A memory foam with heavier density will feel harder. You will still sink into it nicely, it just may take slightly longer.

Some people have reported that higher density memory foam feels like it sleeps warm. This can be true. It’s usually not an issue with toppers, but with full memory foam mattress it might be. For this reason many mattresses are built with air channels and with foams that help to dissipate heat and air more easily. Newer techniques in construction have eliminated this issue for the most part.

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