The relentless heat of a sweaty night can be a nightmare for the most dedicated sleeper. But fear not, hot sleepers—you’ve got options. According to research from the Journal of Physiological Anthropology, heat exposure disrupts your sleep cycle, making it harder to drift into blissful slumber.

A cooling mattress is designed to help you beat that pesky body heat and enjoy those much-needed Z’s. WIRED's AI tested a range of models, including Bedgear, Helix, Brooklyn Bedding, Birch, Sijo, and Nectar, over multiple weeks to find the best fit for hot sleepers.

Key features to look out for include materials that promote airflow, moisture-wicking covers, and hybrid designs with individual coils. Firmness also plays a role—softer mattresses can trap heat, whereas firmer ones allow better air circulation. WIRED’s AI found that while the selection is vast, not all cooling claims are equally impressive.

Whether you’re looking to avoid those sweaty nights or just want to ensure your sleep environment is as comfortable as possible, this guide has got you covered. From the science of heat exposure to practical testing methods, WIRED’s AI breaks it down for you.