Do memory foam mattresses sleep hot?

Traditional memory foam can trap heat because it contours closely and limits airflow. Most mattresses here add gel or copper infusions and breathable covers to counter this; naplab credited the Nectar Classic with above-average cooling and rated the Classic Brands Cool Gel well overall. Deep-contouring foams like the Novilla Bliss, which naplab notes has very deep sinkage, are more likely to feel warm because more of your body is enveloped.