Mattress Ratings >> Memory Foam Mattresses > Memory Foam Sleeping Hot
Memory Foam Mattresses and Heat / Sleeping Hot Problems → Based on Data From Over 4,900 Actual Owners
Page last updated October 6, 2010
What You Need To Know
Memory foam mattress owners sometimes mention that their beds "sleep hot" and are a heat trap.
This means that the mattress absorbs and then fails to disperse a person's body heat, resulting in a sleeping surface that is unnaturally warm.
Sleeping hot is caused by the unique structure of the foam, and, as a result, sleeping hot is usually not an issue with other types of beds, at least not to the extent it is with memory foam.
How Common?
According to our collected data, about 8% of memory foam mattress owners say that their mattress is, at least some of the time, too hot for comfort.
About 15% say their bed is warm, but not enough to be uncomfortable. And the vast majority of memory foam bed owners report no heat problems. (See chart below.)
Brand Comparison
Memory foam mattresses with higher density foam tend to have about twice the number of heat problem reports than lower density foam mattresses.
This may be due to the fact that a person tends to sink more into higher density foam, resulting in less air flow around the body.
Below are how some popular brands perform on this issue. (Higher density beds are in blue and lower density beds are in green.)
| Brand | Percentage
of owners who said their memory foam bed sleeps hot |
| Isoform | 8% |
| Night Therapy | 4% |
| Sleep Innov/Novaform | 9% |
| Spa Sensations | 4% |
| Tempur-pedic | 10% |
| Bodipedic | 5% |