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The best mattresses for keeping cool

Tossing and turning in the summer heatwave? Find out how mattresses from Dreams, John Lewis and Tempur fare in our warmth tests

A summer duvet and an electric fan can only do so much to prevent sleepless summer nights if your mattress is storing up all your body heat.

Memory foam mattresses are notorious for warming up quickly. But it’s not just foam mattresses that can leave you overheating. Our tests reveal that excellent cool mattresses are few and far between.

We’ve just tested 14 new mattresses from the likes of Eve, John Lewis and Tempur. While three of them were good enough to be Best Buys, only one of them feels particularly cool to lie on.

See our full list of Best Buy mattresses.

Mattresses to beat the heat

Of the 99 mattresses we’ve tested in total, only 16 feel especially cool to lie on, and just two of them are good enough to be Best Buys, so you’ll need to choose carefully if warmth is a key concern for you.

The three mattresses we’ve picked out below all feel cooler to lie on than most, so could be good options if you’re often kept awake by overheating. But how warm a mattress feels when you lie on it has no bearing on whether it will provide the long-lasting support your spine needs.

That’s why we don’t take warmth into account when working out the total score for each mattress. So, you’ll need to read our full review before you buy one.

Dreams Mumsnet Kindred – £999

Dreams has partnered with Mumsnet to create a mattress that’s specifically aimed towards parents. The result is a mid-range pocket-sprung mattress with natural fillings. It’s at the firmer end of the scale, which is partly why it is very easy to roll over on when you want to switch sleeping positions during the night.

But does this mean that it’s less good at preventing movement from transferring from one side of the bed to the other?

Read our full review of this Dreams mattress.

John Lewis Natural Collection Hemp 4000 Comfort Support – £599

It may not look especially cheap, but pocket-sprung mattresses with natural hemp and cotton filling tend to cost a lot more than this one from John Lewis. Not only does it feel cooler to lie on than most, but it’s also very breathable. That means it should stop you from sweating on hot and humid nights.

But do the natural fillings make this mattress more susceptible to sagging?

Read our full review of this John Lewis mattress to find out.

Somnus Marquis 14000 (Supremacy range) – £2,069

Luxurious natural fillings such as horsehair and Egyptian cotton are part of what makes the the Somnus Marquis 14000, which we tested earlier in 2018, feel cooler to lie on than most other mattresses we’ve seen.

But a mattress can be comfortable without being supportive, just as they can be expensive without being especially long-lasting. Read our full review of this Somnus mattress to see how it fared in our tests.

Which? mattress reviews

Follow the links below to find out how the other mattresses fared in our recent tests. Or, head to our mattress reviews to see everything we’ve tested.

Bensons for Beds iGel Pegasus – £899
Bensons for Beds Sensaform Memory 6000 Active -£649
Eve The Hybrid – £449
Hyde & Sleep Hybrid Plus Firm – £599
Myers Modern Latex Bed in a Box – £719
Next 1500 Pocket Sprung Pillowtop – £625
Salus i-plus Absolute Luxury 1500 – £469
Sealy Posturepedic Jubilee Latex – £669
Silentnight Geltex Ultra 3000 – £829
Sleepeezee Pocket Gel Collection Balance 1200 – £649
SleepShaper Natural 2000– £650
Tempur Hybrid Supreme – £1,429

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