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The Sweetnight Blog

SweetNight CoolNest Ultra 14-inch memory foam mattress on a wooden bed frame in a warm, naturally lit bedroom during our six-week review
Cooling
Sweetnight Highlights
Jul 25, 20260 comments

SweetNight CoolNest Ultra Review: We Tested the "Up to 11° Cooler" Memory Foam Mattress

We slept on the SweetNight CoolNest Ultra for six weeks in a hot room and ran surface-temperature tests to check the 11C cooling claim. Here is the real result, plus...
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Side sleeper with a pillow between the knees keeping the spine in neutral alignment
Learning Center
Sleep&Health
Jul 24, 20260 comments

Why Your Sleep Position May Be Causing Lower Back Pain

Your sleeping position could be the hidden cause of your lower back pain. See the best and worst positions for your back and the simple fixes you can try tonight.
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Body sinking into dark memory foam with heat glowing at the skin and foam contact surface
Cooling
Learning Center
Jul 23, 20260 comments

Understanding Why Memory Foam Can Feel Hot During Sleep

Love the hug of memory foam but hate waking up sweaty? Here is the material science behind why memory foam feels hot, which foam actually sleeps cool, and how to...
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Man sitting on the edge of his bed in morning light, holding his stiff lower back
Learning Center
Sleep&Health
Jul 22, 20260 comments

Why You Wake Up With Back Stiffness (and How to Fix It)

Waking up with a stiff, achy lower back most mornings? Here is what actually causes morning back stiffness, how to tell if your mattress is to blame, and the fixes...
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Do Cooling Mattresses Actually Work? The Science of CoolNestÂŽ
Learning Center
Jul 21, 20260 comments

Do Cooling Mattresses Actually Work? The Science of CoolNestÂŽ

  Published: July 21, 2026 ¡ Reviewed by the SweetNight Sleep Comfort Team ¡ 16 min read Ask the internet whether cooling mattresses work and you get two useless answers:...
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Menopause Night Sweats and Your Mattress: What Cooling Can and Can't Do
Jul 20, 20260 comments

Menopause Night Sweats and Your Mattress: What Cooling Can and Can't Do

Published: July 22, 2026 ¡ Reviewed by the SweetNight Sleep Comfort Team ¡ 14 min read If you've been waking at 3 a.m. drenched, throwing off the covers, then shivering...
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