There are 4 major types of memory foam:
#1: Traditional memory foam
This is classic memory foam, which is very close to what was used in the 1980s. It's made of petroleum products, and it's way more affordable than other types of memory foam. However, since its manufacturing is still very close to the original processes, this material is plagued by heat retention and the feeling of being stuck in bed.
#2: Gel-infused and Copper-infused memory foam
The best memory foam mattresses to buy today now feature copper and gel infusion technologies. Copper and gel work in a similar way to absorb and dissipate heat, leaving you with a slightly cooler sleeping surface.
#3: Plant-based memory foam
In these mattresses, the manufacturer replaces a portion of the petroleum chemicals with plant products, such as coconut fiber, flax, hemp, and soy. The chief advantage of plant-based memory foam is its reduced carbon footprint, which means a lot to eco-conscious individuals. Additionally, memory foam mattresses infused with plant materials are more breathable, which helps manage heat buildup.
#4: Proprietary memory foam
Memory foam technology is continually changing. Different mattress manufacturers are in a race to engineer a material that offers the pressure-relieving attributes of traditional memory foam, but with a more responsive feel and reduced heat retention issues. While there's still a lot that needs to be done, most manufacturers have made a tremendous improvement in these 2 areas.
Best Foam Mattress
How to Choose a Memory Foam mattress?
Thickness
Memory foam mattresses come in all height profiles ranging from 6" to 14". The height of the mattress does not affect its support and comfort levels a lot, so this is often an issue of personal preference and budget. However, keep in mind that a thin mattress won't last as long as a thick one. To point out, 9" -12" height range tends to be the best for a memory foam mattress.
Density
Mattress density mainly determines the firmness feel and the support level of the bed. Also, it affects the cost, breathability and durability.
i) Low-density memory foam is soft and cheap. But it sags fast and suffers from heat retention and minimal support.
ii) High-density memory foam is expensive and it feels firm and stiff. But it's more supportive and has excellent durability and breathability.
iii) Lastly, medium-density foam offers a happy medium in terms support, comfort, breathability, and durability. That said, it's not surprising that medium-density memory foam mattresses are the most popular.