The Best Memory Foam Mattress for Cool Night’s Sleep

It’s a refreshing feeling to slip into cool sheets on a hot night but many people question if a memory foam mattress can provide that comfort.

Traditional memory foam has a sometimes pesky tendency of retaining heat, which has brought about questions. Newer innovations in memory foam offer a solution and a cooler night’s sleep.


The Problem with Memory Foam

Memory foam mattresses have regularly remained at the top of the chart for comfort, achievingan owner satisfaction rating of 81 percentversus62 percent satisfaction for innerspring mattress owners.


Remaining cool throughout the night is a problem to some degree for owners of almost every kind of mattress. About 5 percent of innerspring mattress owners and 10 percent of memory foam mattress owners say their mattress traps too much heat.


Where Memory Foam Comes From

All memory foam mattresses are made from polyurethane and offer pressure relief and a comfortable sleeping surface. How the polyurethane is made differs though. The traditional kind is made from petroleum byproducts. Newer memory foams can be sourced naturally from plants or infused with gel.


Conventional memory foam tends to have a tighter cell structure that can hinder air circulation, particularly with closed-cell structures. This causes heat to get trapped and create a “stuck” feeling, particularly with denser foams.


Gel-infused foams have either liquid or gel beads blended into polyurethane. The concept is that the gel will feel cool to the touch, however, it warms to the sleeper’s body temperature within 20 minutes and may not enhance breathability.


Plant-based foams replace part of the petroleum with botanically sourced oils and might have a decreased chemical profile compared with other polyurethanes.



Density determines the weight of 1 cubic foot of foam with the ideal density between 4 and 5.3 pounds.The density of a mattress impacts its contouring and ability to dissipate heat.


The middle density range supplies the best balance of sturdiness, support and coolness. Low-density foams (less than 4 pounds) have tend to feel cooler, however, they might not have the best support and may wear out quicker.


High-density foams (more than 5.5 pounds) trap more heat because the cells are closer together and the mattress molds tighter around the sleeper.



How a memory foam mattress is assembled can also affect its heat retention. Because there is less material in which heat can be caught, thinner beds tend to sleep cooler. Mattresses with layers of memory foam thicker than 6 inches might be warmer given that there will be greater contouring.