6 best cooling mattresses in the UK for 2025 for hot sleepers
STRUGGLING to get your beauty sleep because you're too hot under the covers?
You're not alone – and with UK summers getting warmer, finding ways to stay cool at night has never been more important.
The good news? Investing in the best cooling mattress could be your ticket to blissful, sweat-free slumber – giving you the quality kip you need for those busy days ahead.
The best cooling mattresses use clever materials specifically designed to regulate your body temperature while you sleep.
Some incorporate natural fibres like wool, latex or bamboo, while others feature innovative synthetic materials that actively work to keep you cool and help kick insomnia out of the bedroom for good.
Even memory foam – traditionally known for trapping heat – has had a modern makeover, with many brands now using open-cell structures that boost airflow and whisk heat away from your body as you sleep.
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Spring mattresses offer natural breathability as the coils compress and expand, creating air circulation throughout the night.
But for the ultimate temperature control, hybrid mattresses combine the support of springs with cooling foam layers, often topped with temperature-regulating fabrics.
We've put the UK's best mattress that will keep you cool to the test, so you don't have to lose any more sleep over your decision.
Best cooling mattresses at a glance:
- Best cooling mattress overall:
- Best budget cooling mattress:
- Best premium cooling mattress:
- Best cooling mattress for back support:
- Best cooling mattress for couples:
- Best all-round cooling mattress:
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How we tested cooling mattresses
We've put these cooling mattresses through their paces over several weeks, giving our Sun Shopping testers plenty of time to really feel the difference in their sleep quality.
Our team paid close attention to how well each mattress regulated temperature throughout the night – because nobody wants to wake up in a sweat at 3am.
We monitored whether they stayed cool from dusk till dawn, how comfortable each one is to sleep on and examined the materials and construction of each mattress.
We also considered how these elements worked together to affect overall sleep quality.
Value for money was a major factor in our testing too – because a good night's sleep shouldn't cost the earth.
Best cooling mattresses
1. Emma Hybrid Thermosync Mattress
Emma Hybrid Thermosync Mattress, from £519
Pros: Exceptional temperature regulation; support for all sleeping positions; perfect for couples
Cons: May be too soft for some
Rating: 5/5
The Emma Cooling mattress arrived in a box, and thanks to its compact packaging, we were able to lug it upstairs without much fuss (unlike when I was removing my old mattress and transporting it downstairs).
I left the mattress to fully adjust and inflate for the afternoon, so it would be ready for me to sleep on that evening.
I previously just had a pocket-sprung mattress with a thin foam mattress topper, and it wasn't until I slipped into bed and practically melted into the Emma mattress that I realised I had been needlessly suffering in ignorance for too long.
The biggest positive is that as someone who sleeps chaotically on all sides, the Emma mattress is extremely supportive.
Thanks to the base pocket spring layer and a clever upper Halo Memory Foam layer, you get an orthopaedic level of alignment and support, regardless of the position you drift off in.
Needless to say, I slept like a baby night after night, whether I was on my front or my back.
I am someone who takes a long time to heat up in bed, so I often sleep with lots of layers of blankets and, midway through my sleep, end up having to chuck off my covers when I get too hot.
However, with the Emma cooling mattress, I sleep soundly throughout the night without any night sweats or the need to throw my duvet on the floor.
This is all down to Emma's clever ThermoSync technology, which helps regulate your heat, keeping you at an optimal temperature as you rest.
I think the clever temperature regulation of the Emma mattress makes this an ideal option for couples, where one person gets too hot, and the other doesn't.
For me, investing in the Emma cooling mattress has very few downsides; the price may put some people off, but I think the fact you get a 100-night trial means you can effectively test it out before completely committing.
I think the Emma Cooling mattress is worth every penny — and I am enjoying my beauty sleep on it.
Mattress type: Hybrid, Trial period: 200 nights, Guarantee: 10 years
Review by Chantelle Symester
2. Emma Hybrid Premium Mattress
Emma Hybrid Premium Mattress, from £389
Pros: Superior temperature regulation; support for body alignment; washable cover
Cons: Adjustment period; heavier than traditional mattresses
Rating: 4.5/5
The NextGen Premium Plus is a hybrid mattress containing several layers of memory foam and a layer of pocket springs.
It has a breathable cover that contributes to the cooling effects of the mattress and this is handily removable for washing.
The foam and springs work in harmony – I found the Halo memory foam moulded to my shape while the seven zones of pocket springs supported my body, helping keep my hips, spine and neck in alignment.
While memory foam is known for being warm to sleep on, Emma uses an open-structure Airgocell foam in the Premium Plus and this increases air circulation and breathability, stopping you from getting too hot.
Add in the Infinity pocket springs, which are designed for maximum airflow and the cooling cover, and you have a recipe for a great night’s sleep without overheating.
I was also impressed by how much better I felt after sleeping on this mattress. Within weeks niggly aches had disappeared, and I woke feeling well-rested.
Now, after years on a traditional spring mattress, I get what all the hype was about. The NextGen Premium Plus has improved my sleep quality to no end, and it continues to deliver amazing comfort and support.
Mattress type: Hybrid, Trial period: 200 days, Guarantee: 10 years
Review by Zoe Bennetts
3. Tempur Pro SmartCool
Tempur Pro SmartCool Mattress, from £1,499
Pros: Body-conforming support; motion isolation; effective temperature regulation
Cons: Arrives unboxed; premium price point
Rating: 4.5/5
The Tempur Pro SmartCool came unboxed, which was great as I didn’t need to remove a load of packaging and wait for it to inflate before testing it out, but it also made it tricky to manoeuvre up the stairs.
I love that you can choose the firmness of your Tempur mattress, and I opted for a medium.
I found the mattress firmer than the , which also pitches itself as a medium firmness; however, I quite liked that it was slightly firmer as it feels as if your body is well supported, and I got the impression it’s good for your back.
The mattress conforms to your body shape and sort of hugs you, no matter what position you sleep in.
I tend to change sleeping positions throughout the night and found the Tempur Pro SmartCool comfortable on all sides.
My partner also tends to toss and turn, but neither of us could feel each other moving, which is a game changer for a good night's sleep.
The mattress has SmartCool technology that is designed to absorb any excess body heat, leaving you feeling cool and comfortable.
I tested it during the summer and in the autumn when the temperature had dropped, and the heating was on, and throughout both seasons, I found the mattress to be a comfortable temperature.
If you opt for a Super King size mattress, you'll also be able to claim a ; this has a silky texture to it which also makes the mattress feel cooler.
Depending on when you buy the mattress, you may be lucky, and Tempur may throw in other freebies – like a pair of the best cooling pillows – too. Keep an eye out for the best mattress deals.
Mattress type: Memory foam, Trial period: 100 nights, Guarantee: 10 years
Review by Clara Wolsey
4. Otty Original Hybrid Mattress
Otty Original Hybrid Mattress, from £499.99
Pros: Value for money; motion isolation; impressive temperature regulation
Cons: No side handles; requires deep-fitted sheets
Rating: 4.5/5
If your budget for a double mattress is £700 or less, the is the best option available.
You can often find it discounted too — it currently has 15% off on the Otty site.
I tend to move a lot during the night, which used to disturb my partner’s sleep. However, since we started using the Otty Hybrid mattress, we've both been sleeping well.
The mattress allows me to stay cool under the duvet – even during the summer months – and my partner doesn't feel me moving around at all, which highlights how sturdy and high-quality the mattress is.
It arrived with next-day delivery and took about four hours to expand. It’s important to note that you'll need deep sheets, as it may be tricky to get normal sheets to fit (unless you buy a larger size).
The mattress is very comfortable, and the firmness is just right. Any position we sleep in feels comfortable, and I no longer have back pain when I wake up in the morning.
I’ve only deducted 0.5 points from the score because the mattress does not have any side handles, which makes it difficult to rotate every month.
I’ve been using the mattress for five months, and despite containing memory foam, I've noticed that it doesn't develop dents — it returns to its original shape as soon as you get out of bed.
This was the biggest win for me, as our previous hybrid mattress from Hyde & Sleep developed a dent after just a few months, which became uncomfortable.
Otty is rated as excellent on Trustpilot with over 9,900 reviews.
My partner and I are both excited about our Otty Original Hybrid and have recommended it to any friends looking for a new mattress.
Mattress type: Hybrid, Trial period: Five months, Guarantee: 10 years
Review by Pavlina Theodoulou
5. Simba Hybrid Luxe
Simba Hybrid Luxe, from £1,199
Pros: Exceptional cooling; motion isolation; back pain relief
Cons: Weight imbalance issues; requires specialist bedding
Rating: 4.5/5
The Simba Hybrid Luxe is incredibly comfortable and supportive – it has also helped relieve my persistent back pain, which is a bonus!
It’s a heavy mattress, and I struggled – with help – to get it into the bedroom. Once there, I unpacked it and left it around six hours to grow to its full size.
The combination of open-cell memory foam and individual pocket springs work together to create a cooling sensation, which stops any overheating as you sleep.
There are nine layers, comprising a washable cover, wool and bamboo layer (both are naturally thermoregulating), open-structure Simbatex memory foam layer (adding to the cooling effect), four layers of springs, a CertiPur support foam layer and a base layer.
As a result of all this tech, I found this mattress to be one of the coolest I have ever slept on.
What’s more, it absorbs the movement from my husband, which used to disturb my sleep.
Now I don’t feel him turning in the night and this has vastly improved the quality of my rest.
The only negative thing I can say is that because my husband is heavier than me, the mattress dips down at his side and I have a tendency to roll towards him.
Oh, and regular sheets won’t fit — you will need deep sheets for the Hybrid Luxe.
While it is expensive, there are often special offers on the Simba website, or you could consider the Simba Hybrid Pro.
A good mattress is an investment in your future health, and I think it’s worth it. I love this mattress.
Mattress type: Hybrid, Trial period: 200 days, Guarantee: 10 years
Review by Clara Wolsey
6. Simba Hybrid Pro
Simba Hybrid Pro, from £799
Pros: Superior cooling; great comfort and support; no motion transfer
Cons: Heavy to move; requires deeper sheets
Rating: 4.5/5
I had been waking up because I was too hot with my old mattress, so I was eager to see if the Simba Hybrid Pro could help with this.
In short, it did.
The wool top layer is naturally thermoregulating and breathable, so helps prevent overheating, while the Simbatex foam layer boasts an open structure that allows air to circulate through.
Aerocoil and pocket springs push air through the mattress as they compress, adding to the cooling effects, while the whole thing is encased in a cover topped with Simba’s cool-touch Stratos tech fabric.
All in all, there are eight layers working to support you and keep you cool while you sleep, and at the same time, it’s supremely comfortable, and I look forward to going to bed these days.
At first, I was concerned the mattress might be too soft — my old mattress had almost felt like it was made of wood — but I had no problem getting used to the softer feel, and I loved the support it gave at the same time.
It took around a week to get used to it, but then there was no looking back. During a heatwave, it kept me cool and sleeping like a baby, which was very impressive.
There’s also no motion transfer when my partner rolls over, so my sleep isn’t disturbed, and I’m just as comfy sleeping on my back or side.
The Simba Hybrid Pro is a vast improvement on my previous matters,s and though it’s expensive, I think it’s worth every penny.
I think the temperature regulation technology has had the biggest impact on my sleep quality, and now, when I fall asleep, I’m out for the count.
Mattress type: Hybrid, Trial period: 200 days, Guarantee: 10 years
Review by Clara Wolsey
Best cooling mattress FAQs
Click below to navigate FAQs.
- What type of mattress is best for staying cool?
- Do cooling mattresses actually work?
- What type of mattress is best for night sweats?
- What is the best mattress for a hot side-sleeper?
- How much do cooling mattresses cost?
- Are cooling mattresses cold in winter?
What type of mattress is best for staying cool?
Our extensive testing shows that hybrid mattresses combining multiple cooling technologies consistently outperform single-material options when it comes to temperature regulation.
Look for mattresses featuring graphite-infused materials like those in the and ranges – this wonder material actively draws heat away from your body as you sleep.
The difference is genuinely noticeable from the first night.
Natural materials like wool (found in the Simba Hybrid Pro) work brilliantly too, as they're naturally thermoregulating and help wick moisture away from your body.
Don't overlook the importance of airflow – mattresses with pocket springs or Aerocoil technology create essential air channels that allow heat to escape rather than building up around your body.
For serious hot sleepers, mattresses with open-cell foam construction make a massive difference compared to traditional memory foam, which is notorious for trapping heat.
The ultimate cooling champions combine all these technologies – think natural cooling layers, graphite-infusion, and spring systems working together to keep you comfortable all night long.
Do cooling mattresses actually work?
Wondering if cooling mattresses are just a clever marketing gimmick?
We get it – many of us have splashed out on so-called 'cooling' products before, only to wake up in a sweaty mess by 3am.
The good news? After putting dozens of mattresses through rigorous testing, we can confirm that quality cooling mattresses genuinely DO work – but there's a catch.
Not all cooling tech is created equal.
The best performers use multiple cooling methods working together: open-cell foams that allow air to circulate, natural materials like wool and bamboo that wick away moisture, and specially engineered coil systems that promote airflow throughout the night.
Our testing found the most effective cooling mattresses can reduce your sleeping temperature by up to 3°C compared to standard memory foam – enough to transform your sleep quality if you're a hot sleeper.
The difference is most noticeable during heatwaves or if you suffer from night sweats, with many of our testers reporting they no longer need to kick off the covers in the middle of the night.
Bottom line? A proper cooling mattress is worth the investment – but choose wisely and don't fall for gimmicks!
What type of mattress is best for night sweats?
If you're regularly battling soggy sheets, a cooling mattress is an absolute game-changer.
But which type works best for serious sweaters? Our testing shows hybrid mattresses containing both springs and cooling foams consistently outperform all-foam options.
The springs create essential air channels that allow heat to escape, while specially engineered cooling foams wick moisture away from your body.
Look for mattresses featuring natural materials like wool, bamboo, or cotton in their top layers – these fabrics are brilliant at regulating temperature and absorbing moisture without feeling damp.
The newest cooling innovations worth their salt include phase-change materials that actively respond to your body temperature, graphite-infused foams that conduct heat away, and open-cell structures that boost breathability.
For severe night sweats, invest in a mattress with multiple cooling technologies working together – like the Emma NextGen or – rather than one that relies on a single cooling method.
Remember: while a cooling mattress can work wonders, pairing it with breathable bedding will give you the best chance of staying dry all night long.
What is the best mattress for a hot side sleeper?
You'll want to look for a medium-firm hybrid mattress with zoned support that provides extra give around the shoulders and hips (the main pressure points for side sleepers).
The Emma NextGen and Simba Hybrid Pro both nail this balance brilliantly.
Avoid all-foam mattresses completely – even those claiming to be "cooling" – as they simply can't disperse heat effectively when you're pressing your side into them all night.
The absolute game-changers for hot side sleepers are mattresses featuring both temperature-regulating top layers (look for wool or phase-change materials) AND enhanced edge support that allows maximum airflow around your body's contact points.
For severe night sweats, consider mattresses with removable, washable covers that won't trap moisture against your body throughout the night.
How much do cooling mattresses cost?
For a quality double-sized cooling mattress with genuine temperature-regulating tech, expect to pay around £800 – though you can regularly find this knocked down to £600-£700 in sales.
The price jumps dramatically depending on what's inside. Mattresses containing natural cooling materials like wool, bamboo, or cashmere (like the Simba Hybrid Pro) will set you back more than those using synthetic cooling foams.
The good news? Major brands like Emma, Simba and Tempur run hefty discounts throughout the year – we've seen up to 45% off during key sales periods, making premium options much more affordable.
You can keep track of the most current Simba mattress deals and discount codes and Emma mattress deals right here.
High street retailers including Argos, Wayfair and Bensons For Beds also stock cooling mattresses across various price points, so hot sleepers can find options to suit most budgets.
Our top tip? Never pay full price – with a bit of patience and timing your purchase around sales events, you can snag a quality cooling mattress for significantly less than the RRP.
Are cooling mattresses cold in winter?
In short, no – cooling mattresses won't leave you shivering through winter nights!
The name "cooling mattress" is actually a bit misleading. These clever sleep surfaces don't actively cool you down like an air conditioner would – instead, they're designed to regulate your body temperature throughout the year.
What they actually do is pull excess heat away from your body rather than trapping it against you (like traditional memory foam notoriously does).
This temperature regulation works year-round, keeping you in the sleep comfort zone whether it's January or July.
The materials doing the heavy lifting – like graphite-infused foams, phase-change covers, and breathable natural fibers – simply stop you overheating rather than making you cold.
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If you do find yourself feeling chilly during winter nights, the issue is more likely to be your duvet than your mattress.
Upgrading to a higher tog rating for winter (check out our best duvets round-up) while keeping your cooling mattress is the perfect combination for year-round comfort.
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