Can an all-foam mattress regulate temperature effectively?

Yes, an all-foam mattress can regulate temperature effectively if it uses open-cell or ventilated foams, phase-change or moisture-wicking covers, and high-quality temperature-regulating additives. However, foam still stores more heat than coils or latex, so pairing these mattresses with breathable bedding and a suitable room temperature is especially important for hot or fluctuating sleepers.