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Why Some Mattresses Sleep Hot
Traditional memory foam traps heat because its closed-cell structure restricts airflow and conforms closely to the body, creating a warm pocket around the sleeper. The best cooling mattresses use open-cell foam, gel infusion, natural latex, coil systems for airflow, or phase-change materials that actively draw heat away.
Best Overall Cooling: Purple Hybrid Premier
The Purple Grid is the most effective cooling material in the mattress industry. The open grid structure allows air to flow freely through the mattress, and the gel-like polymer neither traps heat nor conducts it toward the body. Consistently rated the coolest-sleeping mattress across independent reviews. Best for hot sleepers who want serious temperature regulation.
Best Cooling Hybrid: Bear Elite Hybrid
Bear’s Celliant-infused cover and copper-gel memory foam work together to draw heat away from the body. The pocketed coil base allows significant airflow underneath the comfort layers. Bear consistently scores well for temperature regulation in side-by-side comparisons.
Best Natural Cooling: Avocado Green Mattress
Natural latex and organic wool are inherently breathable materials. Wool in particular has natural temperature-regulating properties — it wicks moisture and keeps sleepers cooler in summer and warmer in winter. The Avocado Green has no synthetic foam layers that trap heat.
Best Cooling Foam: Nectar Premier Copper
For those who prefer an all-foam feel but sleep hot, Nectar’s Premier Copper version uses copper-infused foam and a phase-change cooling cover. Copper is a natural heat conductor that moves heat away from the body faster than standard gel. Significantly cooler than the standard Nectar.
Cooling Features to Look For
Phase change material (PCM) covers absorb body heat and release it away from the body. Open-cell foam and gel foam both improve airflow vs. traditional memory foam. Coil systems (hybrids) allow air to circulate beneath the comfort layers. Natural latex and wool provide passive temperature regulation without synthetic cooling additives.