More info on beds/comfort factor here:
For example, some latex mattresses feel “too hot” because the perforations (or cells) in the latex core are small (see photo in link) and does not allow much airflow, compared to say, a latex core with much larger cells or a pocket spring mattress. “Unfortunately, consumers almost never get to see the cross-section of mattresses and this is critical in choosing the mattress that’s best suited to you...
Why do mattresses sometimes feel hot?
The density of materials (such as latex) compressed under your weight restricts air flow, which means the material under your body absorbs and retains your heat. Always ask how big the open cells in a latex mattress are; the bigger the cells, the less heat absorbed. Lack of airflow means a latex mattress will at first feel stiff and cold in winter, but becomes more malleable when it warms up from your body heat. Foam allows more airflow, but is the least resilient of mattress materials and loses shape quickly.
http://www.choice.com.au/reviews-and-tests/household/living-and-bedroom/bedding/mattress-satisfactio...
