Waking up drenched in sweat can be a real nightmare, but don’t fear the pillow: a cooling mattress might just save the day. According to research from the Journal of Physiological Anthropology, heat exposure disrupts deep and REM sleep, making hot nights even more unbearable.

Cooling mattresses are designed with breathable materials like gel-infused foam, copper-infused layers, and phase-change fibers that wick away moisture. Our team of sweaty sleepers tested a range of options, from the latest Bedgear and Helix models to Brooklyn Bedding’s cutting-edge designs. We even considered edge support and bounce for an all-around comfortable experience.

When shopping for your cooling mattress, look out for materials that promote airflow, such as bamboo or Tencel lyocell covers. Firmness is also a crucial factor: softer mattresses can retain heat more easily than firmer ones, which allow air to circulate better around the body.

The selection process was rigorous. WIRED tested over 100 mattresses, from organic and hybrid options to those designed specifically for back pain relief. We’ve distilled our findings into a guide that will have you sleeping in cool comfort, regardless of the season or your personal preferences.