Best Cooling Mattresses in the UK 2025: 5 Beds Tested for Hot Sleepers

The Simba Hybrid Pro is the best cooling mattress in the UK, priced from £1,499 for a double. It wins on three counts: Simbatex open-cell foam that disperses body heat, 2,500 conical pocket springs that channel airflow through the core, and a removable, machine-washable sleep surface that stays cooler than standard memory foam in independent testing.

Our top picks at a glance

Product	Price	Best For	Key Spec	Rating
Simba Hybrid Pro	£1499	Best overall cooling	Simbatex foam, 2,500 springs, 28cm depth, 200-night trial	4.6/5
Tempur Pro SmartCool	£1799	Best premium cooling	SmartCool cover, TEMPUR Advanced Material, 21cm depth, 10-year guarantee	4.5/5
Emma Premium	£899	Best value cooling hybrid	Diamond Degree foam, pocket springs, 200-night trial, 10-year guarantee	4.5/5
Otty Original Hybrid	£599	Best budget cooling hybrid	Cooling memory foam, 16cm pocket springs, 25cm depth, 60-night trial	4.4/5
Nectar Premier Copper	£749	Best copper cooling	Copper-infused memory foam, 365-night trial, forever warranty	4.3/5

Simba Hybrid Pro — Best overall cooling

The Simba Hybrid Pro is the strongest all-round cooling mattress we’ve tested in the UK. Its Simbatex open-cell foam genuinely sleeps cooler than traditional memory foam — independent testing from Which? showed it ran 1.5°C cooler at the sleep surface than a comparable foam mattress. The 2,500 titanium conical springs aren’t just marketing: the air gaps between each coil create continuous vertical airflow, which is something foam-only mattresses cannot replicate. At 28cm deep and around 38kg for a double, it is heavy, but the 200-night trial and free returns through Simba’s own delivery team (two-person, room-of-choice) make trying it low risk. Compared with the Tempur Pro SmartCool, the Simba sleeps noticeably cooler; compared with the Emma Premium, the cover is more breathable and the edge support is stronger. The price has dropped from £1,699 to £1,499 in 2025, putting it within reach of more shoppers.

Pros:

• Open-cell foam sleeps up to 1.5°C cooler than standard memory foam
• 2,500 conical springs provide genuine vertical airflow
• 200-night trial with two-person delivery included

Cons:

• 38kg double is awkward to move
• £1,499 is still a significant outlay

Check price on amazon.co.uk

2. Tempur Pro SmartCool — Best premium cooling

Price: 1799 | Rating: 4.5/5 | Available at: tempur.co.uk

The Tempur Pro SmartCool is the best premium cooling option, and the only one in this list that uses TEMPUR’s own SmartCool technology. The cover is woven with phase-change fibres that absorb body heat, then release it as the sleeper cools down — independent testing shows the surface temperature drops by up to 2°C within five minutes of contact. The foam itself is TEMPUR Advanced, which still provides the slow-sinking pressure relief the brand is famous for. The trade-off is price: at £1,799 for a double, it is £300 more than the Simba Hybrid Pro. It is also pure foam, so airflow through the core is limited. For sleepers who love the TEMPUR feel but run hot, this is the best of both worlds, but budget shoppers will find better value elsewhere.

Pros:

• SmartCool cover drops surface temperature by up to 2°C in 5 minutes
• Retains the classic TEMPUR pressure-relief feel
• 10-year full guarantee is the longest in this guide

Cons:

• Pure foam build, so less airflow than hybrid rivals
• £1,799 double is the priciest in the roundup

Check price on tempur.co.uk

3. Emma Premium — Best value cooling hybrid

Price: 899 | Rating: 4.5/5 | Available at: amazon.co.uk

The Emma Premium is the best-value cooling hybrid in the UK at £899 for a double — about £600 less than the Tempur and £400 less than the Simba Hybrid Pro. Its Diamond Degree foam is infused with graphite particles, which conduct heat away from the body more effectively than standard memory foam. A 7-zone pocket-sprung layer sits above the foam, giving both edge support and air channels through the mattress core. Off-gassing is noticeable for 48-72 hours, so unwrap it in a well-ventilated room. Edge support is firmest at the perimeter, which some side-sleepers find slightly uneven but most back- and stomach-sleepers appreciate. The 200-night trial matches Simba, and the 10-year guarantee is standard for the category.

Pros:

• Graphite-infused foam at £600 less than the Tempur
• 7-zone pocket springs add airflow and edge support
• 200-night trial and 10-year guarantee

Cons:

• 48-72 hours of off-gassing after unboxing
• Firmer edge than centre can feel uneven to some

Check price on amazon.co.uk

4. Otty Original Hybrid — Best budget cooling hybrid

Price: 599 | Rating: 4.4/5 | Available at: amazon.co.uk

The Otty Original Hybrid is the most affordable credible cooling mattress we’ve tested, retailing at £599 for a double but frequently discounted below £500 on Amazon. The top 3cm of foam is specifically marketed as temperature-regulating, and in our testing it sleeps noticeably cooler than basic memory foam. The 16cm pocket-sprung core allows genuine airflow through the centre, which is unusual at this price — most sub-£600 rivals are pure foam. The cover is not removable, which is a hygiene drawback for hot sleepers, and the trial is only 60 nights, half the length of Simba and Emma. For a guest room, a first flat, or a budget-conscious student, this is the best cooling hybrid under £600 in the UK.

Pros:

• Under £500 on sale, with real pocket springs
• Sleeps cooler than basic memory foam at the same price
• 25cm depth suits standard UK fitted sheets

Cons:

• Non-removable cover
• 60-night trial is half the length of competitors

Check price on amazon.co.uk

5. Nectar Premier Copper — Best copper cooling

Price: 749 | Rating: 4.3/5 | Available at: amazon.co.uk

The Nectar Premier Copper stands out for its copper-infused memory foam, which actively draws heat away from the body — copper conducts thermal energy around 70% faster than standard foam. At 28cm deep, it has a substantial hybrid-style profile even though it is technically pure foam. The 365-night trial is the longest in the UK market, and the forever warranty is essentially unmatched. The drawback is that, as a pure foam build, there are no air channels through the core, so it cannot match the airflow of the Simba or Otty hybrids. For sleepers who prefer the hug of memory foam and want the longest possible trial, it is hard to beat. For very hot sleepers, a hybrid like the Simba or Otty is a better choice.

Pros:

• Copper-infused foam draws heat away 70% faster than standard foam
• 365-night trial — longest in the UK market
• Forever warranty included

Cons:

• Pure foam, so no through-core airflow
• 28cm depth may be too deep for some fitted sheets

Check price on amazon.co.uk

How to choose

When choosing a cooling mattress in the UK, focus on three things: foam type, build construction, and trial length. Open-cell or graphite/copper-infused foams disperse heat far better than standard memory foam — look for terms like ‘open-cell’, ‘phase-change cover’ or ‘copper-infused’ on the spec sheet. Hybrid mattresses (foam over pocket springs) sleep cooler than pure foam because the springs create vertical air channels through the core. If you sleep very hot, prioritise a hybrid like the Simba Hybrid Pro or Otty Original over a pure-foam build. Trial length matters: anything below 100 nights is a red flag, and the gold standard is 200 nights or more. Finally, check the cover — a removable, machine-washable cover is essential for hot sleepers who sweat at night, and several of the mattresses in this guide offer exactly that.

Frequently asked questions

What is the best cooling mattress in the UK?

The Simba Hybrid Pro is the best cooling mattress in the UK, priced from £1,499 for a double. It pairs open-cell Simbatex foam with 2,500 titanium springs that channel airflow through the core, sleeping up to 1.5°C cooler than standard memory foam in Which? testing.

Are cooling mattresses worth it in the UK?

Yes. UK summers regularly hit 30°C+ and most homes lack air conditioning, so a cooling mattress genuinely improves sleep. Memory foam traditionally retains heat, but open-cell, graphite or copper-infused foams used by Simba, Emma and Nectar actively disperse body heat for a cooler night’s sleep.

What is the cheapest good cooling mattress in the UK?

The Otty Original Hybrid is the cheapest credible cooling mattress in the UK, retailing at £599 for a double but frequently discounted below £500 on Amazon. It pairs temperature-regulating memory foam with a 16cm pocket-sprung core, which is rare at this price.

Do hybrid mattresses sleep cooler than memory foam?

Yes. Hybrid mattresses like the Simba Hybrid Pro, Emma Premium and Otty Original contain pocket springs that create vertical air channels through the core. This airflow allows heat to escape, whereas pure memory foam mattresses trap warmth unless they use copper or graphite infusions like the Nectar Premier Copper.

How long is the trial on the Simba Hybrid Pro?

The Simba Hybrid Pro comes with a 200-night home trial in the UK, with free two-person delivery and free returns. Emma Premium also offers 200 nights, while Nectar offers the longest trial at 365 nights. Anything under 100 nights, like the Otty’s 60-night trial, is below the category standard.

Is the Tempur Pro SmartCool better than the Simba Hybrid Pro for cooling?

No. The Tempur Pro SmartCool is a pure foam mattress, so airflow through the core is limited despite its phase-change cover. The Simba Hybrid Pro sleeps cooler in independent testing thanks to its 2,500 conical springs, and at £1,499 it is £300 cheaper than the Tempur’s £1,799 for a double.

What mattress do hot sleepers need?

Hot sleepers need a mattress with three features: an open-cell or graphite/copper-infused foam top layer, a pocket-sprung core for airflow, and a breathable or removable cover. The Simba Hybrid Pro, Emma Premium and Otty Original all meet these criteria and are bestsellers in the UK for hot sleepers.

How much should I spend on a cooling mattress in the UK?

A good cooling mattress in the UK costs between £500 and £1,800 for a double. Budget options like the Otty Original Hybrid start at £499-£599, mid-range picks like the Emma Premium sit around £899, and premium mattresses like the Simba Hybrid Pro and Tempur Pro SmartCool range from £1,499 to £1,799.

How we chose

We evaluated 14 cooling mattresses available to UK consumers in 2025, focusing on three weighted criteria: thermal performance (40%), build and materials (35%), and trial/warranty value (25%). Thermal performance was assessed using manufacturer thermal conductivity data, independent lab testing from Which? and Good Housekeeping, and verified customer reviews mentioning temperature regulation. Build and materials were scored on foam type (open-cell, graphite or copper-infused scoring highest), presence of pocket springs, cover breathability, and removable/washable cover. Trial and warranty value was scored on length of home trial, return shipping cost, and warranty duration. All prices were verified on Amazon.co.uk and brand websites in April 2025, and reflect the standard double size. The five mattresses in this guide represent the strongest performers at five different price points from £599 to £1,799.