One of the most common complaints about memory foam mattresses is that they sleep hot. While this is a common complaint, it does not mean that all memory foam mattresses in fact sleep hot. The reason this is a common complaint is that the common way to make a memory foam mattress is by utilizing foams that don't breath well, and fabrics that don't absorb or regulate body temperature and moisture.
For example, the leading brand of memory foam mattresses made with a 5.3 lb density polyurethane foam. This type of foam is so dense that there is no way for the heat generated from your body to dissipate, no air flow throughout the mattress. Many of the memory foam mattresses on the market today use this type of foam and have similar complaints.
Another component of these memory foam mattresses is their fabric, which consists of microfiber, which is a fancy word for plastic. Plastic is unable to breath or absorb moisture, so the heat and sweat on the surface of the mattress your body generates has no where to go and contributes to the discomfort you feel in your bed.
But not all memory foam mattresses are created this way, it's just the most cost effective way. The memory foam mattresses at Nest Bedding, produced by Bed In A Box from Tennessee utilizes memory foam that is more breathable and has larger air space in the foam, allowing air flow and moisture from your body to evaporate. The fabrics they use on these mattresses also include natural fiber content which allows the moisture to be absorbed, pulled away from the body and allows the body to cool.
Not all memory foam mattresses sleep hot, and while many do, the ones at Nest Bedding are cool, comfortable, supportive and USA made.