How we built our Luxury Foam Hybrid Mattress-Part 3: 1” High-Density Firm Support Foam

How we built our Luxury Foam Hybrid Mattress-Part 3: 1” High-Density Firm Support Foam

High density foam is a very firm foam that generally makes up the bottom layer of popular memory foam mattresses. Other types of mattresses such as innerspring or hybrid may also use high density foam to support the spring systems.


Density and Mattress Firmness

A mattress may be topped with a relatively low-density foam comfort layer, but still feel like a firm mattress overall. Conversely, mattresses with very high-density support cores can still feel soft overall. In summary, density is a measure of individual components of a mattress.


The density of foam materials used, and a mattress’ overall firmness are certainly related; however, they are not the same thing.

The firmness of a mattress is determined by the entire composition of the bed. Each distinct layer, including various foam comfort layers, support cores, and even metal springs where relevant, all contribute to how a mattress feels.

A mattress may be topped with a relatively low-density foam comfort layer, but still feel like a firm mattress overall. Conversely, mattresses with very high-density support cores can still feel soft overall.

In summary, density is a measure of individual components of a mattress. Firmness is a measure of the entire mattress.



Our next feature will be based on 8” High Profile 852 Ascension X Pocketed Spring System with steel edge.

Kind Regards,

The SpineAlign Team

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