Do all-foam mattresses sleep hot?

All-foam mattresses can sleep warmer than coil beds because solid foam limits airflow and holds body heat near the surface, especially dense memory foam. The effect varies by construction, since open-cell foams, gel or graphite infusions and breathable covers all help release heat. Pairing the bed with a frame that allows air underneath and using moisture-wicking sheets also keeps an all-foam mattress more comfortable for sleepers who run warm.