A lot of people talk about mattresses “sleeping hot.” This is normally most associated with memory foam mattresses. It is true that a lot of memory foam mattresses can retain heat and be a little uncomfortable. This can be really uncomfortable in particularly warm climates. This is because of the chemical composition of memory foam, which tends to trap heat more so than other mattress types.
What do companies do to get around this? Well, this is certainly a big issue and something companies try directly to address. One thing that companies will do is to make their memory foam “gel-infused.” This means a cooling gel is infused into the memory foam itself. While a lot of the marketing that is done will say that this works wonders for keeping a mattress cool, studies show that is actually not the case. Having a gel-infused mattress is only slightly cooler than a normal memory foam mattress. In many cases, it’s the exact same temperature.
Another method that companies will use is to use bio-based foams. Studies do show that using plant-based foams is very effective at keeping a mattress cool. The problem here is that the process to make plant-based foams is pretty expensive, so usually the mattress will be more expensive. However, this methodology does tend to work.
Another method companies will use is to actually laminate a gel layer onto the foam. This differs from gel-infused because it is not infused, it is laminated onto the top layer of the mattress. Studies also show that this is an effective form of keeping a mattress cool.
Those are the three main ways companies will try to design a mattress that stays cool. Latex and innerspring tend not to experience this problem very much. Memory foam has a lot of benefits, but those benefits can be combated if the mattress sleeps really hot. Luckily, most companies are starting to pick up on the best ways to address that issue.