Your Sleep Technology guide.

Your body needs a small drop in core temperature to enter deep sleep. When a mattress traps heat, that drop never fully happens and your brain stays in lighter stages.

A good mattress helps regulate temperature by allowing heat to escape instead of trapping it. The right cooling features can keep your body comfortable so you stay asleep longer and wake up feeling better.

Airflow is how well a mattress allows heat to move away from your body. Materials like coils and breathable layers create space for air to circulate, helping prevent heat buildup. Mattresses with better airflow feel more balanced and less stuffy through the night.

Some mattresses use materials designed to feel cool when you first lie down. These can include gel infusions or special fabrics that pull heat away from your body. They reduce that initial heat buildup and make the surface feel more comfortable right away.

Active cooling uses built-in systems to control temperature. These can adjust how warm or cool the mattress feels throughout the night, usually found in more advanced setups designed for people who struggle with overheating regularly.

Cooling treatments are added to mattress fabrics to help regulate temperature. These can include phase change materials that absorb heat when your body warms up and release it as you cool down. They help keep your temperature more stable throughout the night.

Some mattresses use minerals like graphite or gel to help pull heat away from your body. These materials absorb and spread heat so it does not stay concentrated in one area, creating a cooler sleeping surface.

Cooling yarns are designed to move moisture away from your body. Instead of trapping heat and sweat, they help your mattress stay dry and breathable. Makes a big difference for people who tend to sleep hot or sweat at night.

Natural and synthetic fibers can help regulate temperature by improving airflow and moisture control. These materials keep the surface feeling lighter and less heavy compared to dense fabrics.

Cooling features are not just about comfort. They help you stay asleep longer and improve overall sleep quality, which is what your body actually uses to recover.