Memory foam mattresses are a relatively new development in the luxury bedding market, but for more than 10 years. Most people grew up sleeping on a spring mattress and are familiar with their design and feel. But the composition of bedding with memory is a new consideration, and this makes the comparison of purchases difficult for first consumers.
Different manufacturers of mattresses build their beds with different foam configurations, and everyone says that their way is the best. There are many innovative construction methods that contribute to creating really good foam beds. However, there are other designs that have no value, but remain on the market, because everyone follows sales leaders.
One construction method that has no value, but many mattress manufacturers use it, is folded airflow layerA rolled-up layer of airflow is simply a layer of polyurethane foam (not memory foam) that runs through a rolled-up machine to give it a pulsation or wave pattern. This layer of main foam is placed under a layer of memory foam in order to create air flow channels to remove heat from the body.
The collapsed airflow layer is supposed to be a response to overheating of the memory foam. In fact, one of the biggest complaints about memory foam beds is that they get too hot for some people. Thus, manufacturers have experimented with folded foam to make sure that it helps keep the mattress cool. The idea is that it will allow the air to circulate along the open spaces, replacing the warm air next to your body with the cooler air outside the mattress. They found that the winding layer did not help keep the bed cool at all, but buyers liked the idea, and it helped sell more beds.
Causes are skeptical of layers with bent airflow
First, the foam beds have at least 2 layers of foam (glued together). If the layer has a folded layer, then this adds a third layer. Other layers may include super soft pillow layers on top of the bed and base layers of varying hardness. When a layer of memory foam is stuck on top of a folded layer, the convoluted bumps are aligned and stick to the bottom of the layer of memory foam. The edges of the folded layer are not glued, so the outside of the mattress still looks as if it might work. But if you looked at the cut-out of the cross section from the bed, you would see that not a single air can squeeze through.
Secondly, even if the airflow layer was not glued together (as in the component layer), the convolutions or channels will not circulate a significant amount of air (if any). The sides of the bed, where the outside air is drawn into the mattress, are covered first with a mattress cover, then sheets, then blankets, a blanket, etc. Of course, this is not an ideal ventilation system.
Thirdly, there are no studies confirming the claim that the layers of the air flow are working. Can be done simply. In fact, there is an airflow study that is usually done to check the airflow of open-cell foam.
