Cooling Sheets and Cooling Mattresses
- Professor Goodsleep
- Jun 8
- 3 min read
Updated: Jul 4
If you sleep hot, you’ve probably seen dozens of products promising “cooling” comfort—sheets, toppers, pillows, and high-tech mattresses. But not all cooling solutions work the same way. Understanding the difference between cooling sheets and cooling mattresses can help you spend your money where it matters most.
Why Some People Sleep Hot
Overheating at night can come from several factors:
Your body’s natural temperature regulation
Hormonal changes
Heavy or non-breathable bedding
A mattress that traps heat
Room temperature and humidity
The goal of any cooling product is to help your body release heat instead of trapping it around you.
What Cooling Sheets Actually Do
Cooling sheets focus on the surface closest to your skin. They can help by:
Wicking away moisture (sweat)
Allowing more airflow around your body
Feeling cool to the touch when you first lie down
Common “cooling” sheet materials include:
Bamboo or viscose from bamboo: breathable and moisture-wicking
Tencel/lyocell: smooth, cool, and good at managing moisture
Lightweight cotton percale: crisp and airy
However, sheets have limits. If the mattress underneath is trapping heat, sheets can only do so much.
What Cooling Mattresses Are Designed to Do
Cooling mattresses try to address heat at a deeper level. They may use:
Gel-infused foams to absorb some heat
Open-cell foams to improve airflow
Phase change materials (PCM) that feel cool at first contact
Coil systems that allow air to move through the mattress core
Breathable covers that work with the comfort layers
A truly well-designed cooling mattress doesn’t just feel cool for a few minutes—it helps prevent heat from building up over the night.
Cooling Sheets vs. Cooling Mattress: Which Matters More?
Think of it this way:
If your mattress sleeps very hot, cooling sheets are like opening a window while the oven is on. They may help a little, but the main heat source is still there.
If your mattress is fairly neutral, cooling sheets can be enough to keep you comfortable.
In many cases, the mattress has the bigger impact on long-term temperature control, while sheets fine-tune the feel at the surface.
When to Start with Sheets
Cooling sheets may be the better first step if:
Your budget is limited right now.
You only sleep hot during certain seasons.
Your mattress is still in good shape for support and comfort.
In that case, look for:
Breathable weaves (percale over sateen)
Natural or moisture-wicking fibers
Lighter colors, which tend to absorb less heat
When to Consider a Cooling Mattress
A cooling-focused mattress may be worth it if:
You wake up sweaty most nights, year-round.
You’ve already tried lighter bedding and still overheat.
Your current mattress is older or already uncomfortable.
Pay attention to:
How the mattress handles airflow (coils vs. solid foam)
Whether the cooling features are only in the cover or throughout the comfort layers
Real customer reviews from hot sleepers, not just marketing terms
Combining Both for Best Results
For many hot sleepers, the best solution is a combination:
A mattress that doesn’t trap heat
Breathable, moisture-wicking sheets
A room kept at a cooler temperature, if possible
This layered approach supports your body’s natural cooling process instead of fighting against it.
Final Thoughts
“Cooling” is more than a buzzword—it’s about how well your sleep system lets heat escape. Sheets can improve surface comfort, but if your mattress is the main source of heat buildup, it may be time to address the foundation. Start with the biggest problem, then fine-tune with bedding so you can sleep cooler and wake up more refreshed.
Don't Worry, Sleep Happy.
Professor Goodsleep
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