Density is a characteristic we generally associate with quality and is extremely important when choosing memory foam mattresses. That's why it's common to wonder what should be the density of a mattress or what this characteristic actually refers to.
If you're in the midst of searching for a new memory foam mattress, you've probably noticed that there's quite a price difference between various options. This is due to several factors, but if you're observant, you've likely noticed that options with higher density tend to be more expensive. Why is that? Let's find out below.
We'll explain what mattress density is and its importance in defining its quality, we'll clarify how it's calculated and the conclusions you can draw from it. Lastly, we'll discuss what density a baby's mattress should have. Keep reading!
What Is Mattress Density?
Put simply, it's an indicator of how much memory foam our mattress actually contains. Remember, as we've explained in previous texts, there are no pure memory foam mattresses; instead, you can find options with different core materials finished with memory foam padding. Mattress density refers to the kilograms of raw material used to manufacture one cubic meter of foam or padding. It's an indicator of product quality, especially in terms of resilience and durability. Generally, the higher this characteristic, the better the mattress will perform.
As a rule, options with lower density are more affordable because they use less memory foam in their production. Instead, there may be air or other polymers in their place. This means that, although they will have the unique properties of this material, they won't be as optimal as mattresses with a higher value.
In other words, these paddings will deform sooner and start losing their memory effect (their ability to adapt to the body and regain their shape after weight is removed). This directly translates to them having a shorter lifespan, lasting around five years instead of the ten that higher-density options can provide.
This factor also greatly influences comfort. Undoubtedly, a mattress with higher values will better conform to the body's curves but won't sink when weight is applied. In the long run, this characteristic is essential for preventing back pain.
Similarly, higher density usually means a more viscous feel and greater heat retention because there is less air within its structure. Therefore, if you tend to get hot at night, you might prefer an option with a lower value.
How to Determine Your Mattress Density
Mattress density is calculated by dividing the weight in kilograms by the mattress measurement, expressed in cubic meters. This gives us an idea of the weight of the raw material and its quantity, allowing us to classify mattresses into three types:
- Low: those with a value between 18 and 40 kilograms per cubic meter.
- Medium: those with a value between 40 and 80 kilograms per cubic meter.
- High: any mattress with a value exceeding 80 kilograms per cubic meter.
In general, a higher density implies better body adaptation but also a firmer mattress. Of course, it's an indicator of quality, but this doesn't mean that everyone should choose the highest value. For example, if you prefer a softer feel, you might rest more comfortably on a medium-density mattress.
Of course, economic factors also play a significant role. Memory foam is a raw material with a relatively high cost, so the amount used in the mattress significantly affects its price. However, other factors such as size, the quality of other materials, the number of memory foam layers, or the type of core material are also taken into account.
On the other hand, a greater amount of memory foam typically means less air content within the mattress. This always results in a longer lifespan for the mattress under optimal conditions. Although two options may initially seem to have similar comfort and features, it's important to consider that you'll be spending several hours each night resting on them. This, without a doubt, generates some wear and tear. The lifespan of a memory foam mattress greatly depends on its density; higher-density options can last twice as long. Keep this in mind when choosing your mattresses.
Appropriate Mattress Density for a Baby
When choosing a mattress for a baby, it's important to consider that infants have very specific needs. For example, we must always choose options that correctly adapt to their bodies. This refers not only to size but also to thickness and, of course, density.
Both factors should be medium, baby mattresses should have a thickness ranging from 12 to 18 cm because babies are very lightweight. Meanwhile, the density of these mattresses should fall between 20 and 22 kilograms per cubic meter. This ensures that it's firm enough to support their bodies without causing harm and other issues like positional plagiocephaly, which can occur when a baby sleeps on a surface that's too hard, affecting the shape of their still-forming head.