A cooler bedroom isn’t just a comfort preference; it’s a proven shortcut to better sleep, healthier metabolism and even younger looking skin.
Below you’ll find the key benefits of sleeping cool, plus a quick guide to making it happen, followed by geek-worthy facts that might just persuade you to turn the thermostat down...
Cool-Sleep Quick Facts
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Your body’s “sleep switch” is a 1.3 °C drop. Core temperature must fall by roughly 1.3 °C (2 °F) before melatonin surges and drowsiness kicks in. empowersleep.com
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Brown-fat boost: Four weeks at 19 °C overnight increased brown-fat volume by 42 % and sharpened insulin sensitivity in an NIH-funded trial. stagetestdomain3.nih.gov
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Heat steals shut-eye: A 2025 study of 23 million sleep records found that every 10 °C rise in night-time temperature robs you of 9.7 minutes of total sleep (with deep sleep shrinking the most). nature.com
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The UK sweet spot is 18 °C–20 °C. Doctors and the Sleep Foundation agree that most adults drift off fastest in this range (65–68 °F). sleepfoundation.org
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Mattress tech matters: The hybrid REM-Fit 600 Lux Elite earned a rare five-star T3 verdict for its “impressive temperature control,” making it a go-to for hot sleepers. t3.com
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Award-winning value: The REM-Fit Hybrid Pocket 1000 was crowned Good Housekeeping “Best Value Hybrid Mattress 2025,” praised for its breathability and open-cell foam that whisks heat away. rem-fit.co.uk
Why Staying Cool Works
| Benefit | What the science shows |
|---|---|
| Beats insomnia | Cooling the head and body calms the “revved-up” brain activity that plagues insomniacs and cuts time-to-sleep. |
| Keeps you looking younger | Cooler conditions let melatonin flow all night, supporting skin repair and collagen production. |
| Deepens restorative sleep | Temperatures between 16 °C and 19 °C lengthen slow-wave and REM stages, aiding recovery and memory. |
| Supports a healthy metabolism | Regular cool nights stimulate calorie-burning brown fat and improve insulin sensitivity. |
How to Create a Cooler Bed Tonight
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Open the windows and dial the heating down. Start at 18 °C and adjust by a degree until it feels effortless to drift off.
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Switch to breathable bedding such as cotton, bamboo or Tencel®.
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Upgrade your mattress. REM-Fit hybrids use open-cell memory foam and up to 5,000 pocket springs to circulate air and regulate temperature while offering superb comfort.
Need tailored advice? The REM-Fit sleep team is on hand, just email sales@rem-fit.co.uk and they’ll happily match you to the right cooling mattress for your room size, budget and preferred firmness.
Sweet dreams!
